Fix text overflow

lib/ui/screens/update_conversation_screen.dart

@@ -171,7 +171,9 @@ class _UpdateConversationScreen extends State<UpdateConversationScreen> {
                           })
                       : null,
                 ),
-                Text(tr("Allow all members of the conversation to add users"))
+                Flexible(
+                    child: Text(tr(
+                        "Allow all members of the conversation to add users")))
               ],
             ),