Change the input field text being set after posting message to not use a Qt.binding fucntion so that the the same room in two windows doesn't get the textfields bound together.

imports/NeoChat/Component/ChatBox/ChatBar.qml

@@ -405,9 +405,7 @@ ToolBar {
         }
         currentRoom.markAllMessagesAsRead();
         inputField.clear();
-        inputField.text = Qt.binding(function() {
-            return currentRoom ? currentRoom.cachedInput : "";
-        });
+        inputField.text = currentRoom ? currentRoom.cachedInput : "";
         messageSent()
     }