diff --git a/package-lock.json b/package-lock.json
index e01b9f2..b927be5 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -2168,6 +2168,18 @@
         "strip-json-comments": "^3.1.1"
       },
       "dependencies": {
+        "ajv": {
+          "version": "6.12.6",
+          "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.12.6.tgz",
+          "integrity": "sha512-j3fVLgvTo527anyYyJOGTYJbG+vnnQYvE0m5mmkc1TK+nxAppkCLMIL0aZ4dblVCNoGShhm+kzE4ZUykBoMg4g==",
+          "dev": true,
+          "requires": {
+            "fast-deep-equal": "^3.1.1",
+            "fast-json-stable-stringify": "^2.0.0",
+            "json-schema-traverse": "^0.4.1",
+            "uri-js": "^4.2.2"
+          }
+        },
         "globals": {
           "version": "13.10.0",
           "resolved": "https://registry.npmjs.org/globals/-/globals-13.10.0.tgz",
@@ -2193,6 +2205,12 @@
             "resolve-from": "^4.0.0"
           }
         },
+        "json-schema-traverse": {
+          "version": "0.4.1",
+          "resolved": "https://registry.npmjs.org/json-schema-traverse/-/json-schema-traverse-0.4.1.tgz",
+          "integrity": "sha512-xbbCH5dCYU5T8LcEhhuh7HJ88HXuW3qsI3Y0zOZFKfZEHcpWiHU/Jxzk629Brsab/mMiHQti9wMP+845RPe3Vg==",
+          "dev": true
+        },
         "resolve-from": {
           "version": "4.0.0",
           "resolved": "https://registry.npmjs.org/resolve-from/-/resolve-from-4.0.0.tgz",
@@ -3261,14 +3279,14 @@
       }
     },
     "ajv": {
-      "version": "6.12.6",
-      "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.12.6.tgz",
-      "integrity": "sha512-j3fVLgvTo527anyYyJOGTYJbG+vnnQYvE0m5mmkc1TK+nxAppkCLMIL0aZ4dblVCNoGShhm+kzE4ZUykBoMg4g==",
+      "version": "7.2.4",
+      "resolved": "https://registry.npmjs.org/ajv/-/ajv-7.2.4.tgz",
+      "integrity": "sha512-nBeQgg/ZZA3u3SYxyaDvpvDtgZ/EZPF547ARgZBrG9Bhu1vKDwAIjtIf+sDtJUKa2zOcEbmRLBRSyMraS/Oy1A==",
       "dev": true,
       "requires": {
         "fast-deep-equal": "^3.1.1",
-        "fast-json-stable-stringify": "^2.0.0",
-        "json-schema-traverse": "^0.4.1",
+        "json-schema-traverse": "^1.0.0",
+        "require-from-string": "^2.0.2",
         "uri-js": "^4.2.2"
       }
     },
@@ -5280,6 +5298,18 @@
             "@babel/highlight": "^7.10.4"
           }
         },
+        "ajv": {
+          "version": "6.12.6",
+          "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.12.6.tgz",
+          "integrity": "sha512-j3fVLgvTo527anyYyJOGTYJbG+vnnQYvE0m5mmkc1TK+nxAppkCLMIL0aZ4dblVCNoGShhm+kzE4ZUykBoMg4g==",
+          "dev": true,
+          "requires": {
+            "fast-deep-equal": "^3.1.1",
+            "fast-json-stable-stringify": "^2.0.0",
+            "json-schema-traverse": "^0.4.1",
+            "uri-js": "^4.2.2"
+          }
+        },
         "ansi-styles": {
           "version": "4.3.0",
           "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-4.3.0.tgz",
@@ -5398,6 +5428,12 @@
             "resolve-from": "^4.0.0"
           }
         },
+        "json-schema-traverse": {
+          "version": "0.4.1",
+          "resolved": "https://registry.npmjs.org/json-schema-traverse/-/json-schema-traverse-0.4.1.tgz",
+          "integrity": "sha512-xbbCH5dCYU5T8LcEhhuh7HJ88HXuW3qsI3Y0zOZFKfZEHcpWiHU/Jxzk629Brsab/mMiHQti9wMP+845RPe3Vg==",
+          "dev": true
+        },
         "path-key": {
           "version": "3.1.1",
           "resolved": "https://registry.npmjs.org/path-key/-/path-key-3.1.1.tgz",
@@ -6476,6 +6512,26 @@
       "requires": {
         "ajv": "^6.12.3",
         "har-schema": "^2.0.0"
+      },
+      "dependencies": {
+        "ajv": {
+          "version": "6.12.6",
+          "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.12.6.tgz",
+          "integrity": "sha512-j3fVLgvTo527anyYyJOGTYJbG+vnnQYvE0m5mmkc1TK+nxAppkCLMIL0aZ4dblVCNoGShhm+kzE4ZUykBoMg4g==",
+          "dev": true,
+          "requires": {
+            "fast-deep-equal": "^3.1.1",
+            "fast-json-stable-stringify": "^2.0.0",
+            "json-schema-traverse": "^0.4.1",
+            "uri-js": "^4.2.2"
+          }
+        },
+        "json-schema-traverse": {
+          "version": "0.4.1",
+          "resolved": "https://registry.npmjs.org/json-schema-traverse/-/json-schema-traverse-0.4.1.tgz",
+          "integrity": "sha512-xbbCH5dCYU5T8LcEhhuh7HJ88HXuW3qsI3Y0zOZFKfZEHcpWiHU/Jxzk629Brsab/mMiHQti9wMP+845RPe3Vg==",
+          "dev": true
+        }
       }
     },
     "has": {
@@ -7341,9 +7397,9 @@
       }
     },
     "json-schema-traverse": {
-      "version": "0.4.1",
-      "resolved": "https://registry.npmjs.org/json-schema-traverse/-/json-schema-traverse-0.4.1.tgz",
-      "integrity": "sha512-xbbCH5dCYU5T8LcEhhuh7HJ88HXuW3qsI3Y0zOZFKfZEHcpWiHU/Jxzk629Brsab/mMiHQti9wMP+845RPe3Vg==",
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/json-schema-traverse/-/json-schema-traverse-1.0.0.tgz",
+      "integrity": "sha512-NM8/P9n3XjXhIZn1lLhkFaACTOURQXjWhV4BA/RnOv8xvgqtqpAX9IO4mRQxSx1Rlo4tqzeqb0sOlruaOy3dug==",
       "dev": true
     },
     "json-stable-stringify-without-jsonify": {
@@ -11363,6 +11419,12 @@
           "integrity": "sha512-5p6WTN0DdTGVQk6VjcEju19IgaHudalcfabD7yhDGeA6bcQnmL+CpveLJq/3hvfwd1aof6L386Ougkx6RfyMIQ==",
           "dev": true
         },
+        "json-schema-traverse": {
+          "version": "0.4.1",
+          "resolved": "https://registry.npmjs.org/json-schema-traverse/-/json-schema-traverse-0.4.1.tgz",
+          "integrity": "sha512-xbbCH5dCYU5T8LcEhhuh7HJ88HXuW3qsI3Y0zOZFKfZEHcpWiHU/Jxzk629Brsab/mMiHQti9wMP+845RPe3Vg==",
+          "dev": true
+        },
         "schema-utils": {
           "version": "3.1.1",
           "resolved": "https://registry.npmjs.org/schema-utils/-/schema-utils-3.1.1.tgz",
@@ -11372,6 +11434,20 @@
             "@types/json-schema": "^7.0.8",
             "ajv": "^6.12.5",
             "ajv-keywords": "^3.5.2"
+          },
+          "dependencies": {
+            "ajv": {
+              "version": "6.12.6",
+              "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.12.6.tgz",
+              "integrity": "sha512-j3fVLgvTo527anyYyJOGTYJbG+vnnQYvE0m5mmkc1TK+nxAppkCLMIL0aZ4dblVCNoGShhm+kzE4ZUykBoMg4g==",
+              "dev": true,
+              "requires": {
+                "fast-deep-equal": "^3.1.1",
+                "fast-json-stable-stringify": "^2.0.0",
+                "json-schema-traverse": "^0.4.1",
+                "uri-js": "^4.2.2"
+              }
+            }
           }
         }
       }
@@ -11962,6 +12038,12 @@
           "integrity": "sha512-9ByhssR2fPVsNZj478qUUbKfmL0+t5BDVyjShtyZZLiK7ZDAArFFfopyOTj0M05wE2tJPisA4iTnnXl2YoPvOA==",
           "dev": true
         },
+        "json-schema-traverse": {
+          "version": "0.4.1",
+          "resolved": "https://registry.npmjs.org/json-schema-traverse/-/json-schema-traverse-0.4.1.tgz",
+          "integrity": "sha512-xbbCH5dCYU5T8LcEhhuh7HJ88HXuW3qsI3Y0zOZFKfZEHcpWiHU/Jxzk629Brsab/mMiHQti9wMP+845RPe3Vg==",
+          "dev": true
+        },
         "schema-utils": {
           "version": "3.1.1",
           "resolved": "https://registry.npmjs.org/schema-utils/-/schema-utils-3.1.1.tgz",
@@ -11971,6 +12053,20 @@
             "@types/json-schema": "^7.0.8",
             "ajv": "^6.12.5",
             "ajv-keywords": "^3.5.2"
+          },
+          "dependencies": {
+            "ajv": {
+              "version": "6.12.6",
+              "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.12.6.tgz",
+              "integrity": "sha512-j3fVLgvTo527anyYyJOGTYJbG+vnnQYvE0m5mmkc1TK+nxAppkCLMIL0aZ4dblVCNoGShhm+kzE4ZUykBoMg4g==",
+              "dev": true,
+              "requires": {
+                "fast-deep-equal": "^3.1.1",
+                "fast-json-stable-stringify": "^2.0.0",
+                "json-schema-traverse": "^0.4.1",
+                "uri-js": "^4.2.2"
+              }
+            }
           }
         }
       }
diff --git a/package.json b/package.json
index 85e66bb..5a8e142 100644
--- a/package.json
+++ b/package.json
@@ -65,6 +65,7 @@
     "@types/node": "^12.11.1",
     "@typescript-eslint/eslint-plugin": "^4.29.0",
     "@typescript-eslint/parser": "^4.29.0",
+    "ajv": "^7.2.4",
     "codelyzer": "^6.0.0",
     "electron": "^19.0.6",
     "eslint": "^7.32.0",
diff --git a/src/styles.scss b/src/styles.scss
index 9b31275..3d083ef 100644
--- a/src/styles.scss
+++ b/src/styles.scss
@@ -12,7 +12,7 @@
 html, body { height: 100%; }
 body { margin: 0; font-family: Roboto, "Helvetica Neue", sans-serif; }
 
-@import '~@angular/material/theming';
+@import '@angular/material/theming';
 // Plus imports for other components in your app.
 
 /*// Typography