wrap textfield in selection area to make typing work on Safari and Firefox (#1251)

lib/pages/chat/input_bar.dart

@@ -472,7 +472,8 @@ class InputBar extends StatelessWidget {
           // show suggestions after 50ms idle time (default is 300)
           // #Pangea
           // builder: (context, controller, focusNode) => TextField(
-          builder: (context, _, focusNode) => TextField(
+          builder: (context, _, focusNode) => SelectionArea(
+            child: TextField(
               enableSuggestions: false,
               readOnly:
                   controller != null && controller!.choreographer.isRunningIT,
@@ -541,6 +542,7 @@ class InputBar extends StatelessWidget {
               },
               textCapitalization: TextCapitalization.sentences,
             ),
+          ),
           suggestionsCallback: getSuggestions,
           itemBuilder: (c, s) =>
               buildSuggestion(c, s, Matrix.of(context).client),