chore: Add label to homeserver textfield

assets/l10n/intl_en.arb

@@ -923,6 +923,7 @@
     "type": "text",
     "placeholders": {}
   },
+  "homeserver": "Homeserver",
   "enterYourHomeserver": "Enter your homeserver",
   "@enterYourHomeserver": {
     "type": "text",

lib/pages/views/homeserver_picker_view.dart

@@ -39,6 +39,7 @@ class HomeserverPickerView extends StatelessWidget {
             onSubmit: (_) => controller.checkHomeserverAction(),
             unfocusOnClear: false,
             autocorrect: false,
+            labelText: L10n.of(context).homeserver,
           ),
           elevation: 0,
         ),
@@ -78,7 +79,10 @@ class HomeserverPickerView extends StatelessWidget {
                           return Center(child: CircularProgressIndicator());
                         }
                         return Padding(
-                          padding: const EdgeInsets.all(12.0),
+                          padding: const EdgeInsets.symmetric(
+                            horizontal: 12.0,
+                            vertical: 4.0,
+                          ),
                           child: Column(
                             mainAxisSize: MainAxisSize.min,
                             crossAxisAlignment: CrossAxisAlignment.stretch,

lib/widgets/default_app_bar_search_field.dart

@@ -11,6 +11,7 @@ class DefaultAppBarSearchField extends StatefulWidget {
   final bool autofocus;
   final String prefixText;
   final String hintText;
+  final String labelText;
   final EdgeInsets padding;
   final bool readOnly;
   final Widget prefixIcon;
@@ -27,6 +28,7 @@ class DefaultAppBarSearchField extends StatefulWidget {
     this.prefixText,
     this.hintText,
     this.padding,
+    this.labelText,
     this.readOnly = false,
     this.prefixIcon,
     this.unfocusOnClear = true,
@@ -89,6 +91,7 @@ class DefaultAppBarSearchFieldState extends State<DefaultAppBarSearchField> {
         onSubmitted: widget.onSubmit,
         decoration: InputDecoration(
           prefixText: widget.prefixText,
+          labelText: widget.labelText,
           enabledBorder: OutlineInputBorder(
             borderRadius: BorderRadius.circular(AppConfig.borderRadius),
             borderSide: