Merge pull request 'Fix colors and make passphrase submittable via Enter' (#10) from fix-dialog-colors into master

Reviewed-on: #10

lib/pages/lobby_selector.dart

@@ -61,6 +61,7 @@ class _LobbySelectorState extends State<LobbySelector> {
       context: context,
       builder: (BuildContext context) {
         return Scaffold(
+          backgroundColor: Colors.transparent,
           body: AlertDialog(
             title: const Text('Host or join?'),
             actions: <Widget>[
@@ -100,18 +101,14 @@ class _LobbySelectorState extends State<LobbySelector> {
                 title: const Text('Enter the passphrase here:'),
                 content: TextField(
                   controller: phraseController,
+                  onSubmitted: (val) {
+                    submitPassphrase(builderContext);
+                  },
                   decoration: InputDecoration(
                       hintText: 'Enter passphrase here',
                       suffixIcon: IconButton(
                         onPressed: () {
-                          joinGameFuture = joinPrivateGame(builderContext);
+                          submitPassphrase(builderContext);
-                          joinGameFuture.then((value) {
-                            if (value != null) {
-                              phraseController.clear();
-                              builderContext.pop();
-                              switchToGame(value);
-                            }
-                          });
                         },
                         icon: const Icon(Icons.check),
                       )),
@@ -132,6 +129,17 @@ class _LobbySelectorState extends State<LobbySelector> {
     );
   }
 
+  void submitPassphrase(BuildContext ctx) {
+    joinGameFuture = joinPrivateGame(ctx);
+    joinGameFuture.then((value) {
+      if (value != null) {
+        phraseController.clear();
+        ctx.pop();
+        switchToGame(value);
+      }
+    });
+  }
+
   void switchToGame(PlayerInfo info) {
     var chessGameArgs = ChessGameArguments(
         lobbyID: info.lobbyID!,