fix: Minor design bugs

lib/components/connection_status_header.dart

@@ -36,7 +36,7 @@ class _ConnectionStatusHeaderState extends State<ConnectionStatusHeader> {
         );
 
     return AnimatedContainer(
-      duration: Duration(milliseconds: 500),
+      duration: Duration(milliseconds: 300),
       height: _connected ? 0 : 5,
       child: LinearProgressIndicator(),
     );

lib/components/list_items/chat_list_item.dart

@@ -143,8 +143,7 @@ class ChatListItem extends StatelessWidget {
                   ? Padding(
                       padding: const EdgeInsets.only(left: 4.0),
                       child: Icon(
-                        Icons.favorite,
-                        color: Colors.grey[400],
+                        Icons.favorite_outline_rounded,
                         size: 16,
                       ),
                     )
@@ -153,8 +152,7 @@ class ChatListItem extends StatelessWidget {
                   ? Padding(
                       padding: const EdgeInsets.only(left: 4.0),
                       child: Icon(
-                        Icons.notifications_off,
-                        color: Colors.grey[400],
+                        Icons.notifications_off_outlined,
                         size: 16,
                       ),
                     )
@@ -164,7 +162,6 @@ class ChatListItem extends StatelessWidget {
                 child: Text(
                   room.timeCreated.localizedTimeShort(context),
                   style: TextStyle(
-                    color: Color(0xFF555555),
                     fontSize: 13,
                   ),
                 ),

lib/components/theme_switcher.dart

@@ -114,7 +114,7 @@ final ThemeData amoledTheme = ThemeData.dark().copyWith(
 
 Color chatListItemColor(BuildContext context, bool activeChat, bool selected) =>
     selected
-        ? Theme.of(context).primaryColor.withAlpha(50)
+        ? Theme.of(context).primaryColor.withAlpha(100)
         : Theme.of(context).brightness == Brightness.light
             ? activeChat
                 ? Color(0xFFE8E8E8)

lib/views/chat.dart

@@ -619,7 +619,7 @@ class _ChatState extends State<_Chat> {
                                       height: seenByText.isEmpty ? 0 : 24,
                                       duration: seenByText.isEmpty
                                           ? Duration(milliseconds: 0)
-                                          : Duration(milliseconds: 500),
+                                          : Duration(milliseconds: 300),
                                       alignment:
                                           filteredEvents.first.senderId ==
                                                   client.userID

lib/views/chat_list.dart

@@ -545,7 +545,7 @@ class _ChatListState extends State<ChatList> {
                                               children: [
                                                 AnimatedContainer(
                                                   duration: Duration(
-                                                      milliseconds: 500),
+                                                      milliseconds: 300),
                                                   height: displayPresences
                                                       ? 78
                                                       : displayShareStatus