Fix text content disappearing when Ctrl + Alt + A key combination is used (#773)

Source/Core/Elements/WidgetTextInput.cpp

@@ -593,7 +593,7 @@ void WidgetTextInput::ProcessEvent(Event& event)
 
 		case Input::KI_A:
 		{
-			if (ctrl)
+			if (ctrl && !alt)
 				Select();
 		}
 		break;