added a way to disable touch screen event handling

Needed for EdgeTX issue #185

radio/src/thirdparty/libopenui/src/mainwindow.cpp

@@ -46,6 +46,9 @@ void MainWindow::checkEvents()
     touchPanelRead();
   }
 
+  if(!touchEnabled)
+       touchState.event = TE_NONE;
+
   if (touchState.event == TE_DOWN) {
     onTouchStart(touchState.x + scrollPositionX, touchState.y + scrollPositionY);
     slidingWindow = nullptr;

radio/src/thirdparty/libopenui/src/mainwindow.h

@@ -64,6 +64,13 @@ class MainWindow: public Window
 
     void checkEvents() override;
 
+#if defined(HARDWARE_TOUCH)
+    void setTouchEnabled(bool enable)
+    {
+      touchEnabled = enable;
+    }
+#endif
+
     void invalidate()
     {
       invalidate({0, 0, rect.w, rect.h});
@@ -85,4 +92,7 @@ class MainWindow: public Window
     static void emptyTrash();
     rect_t invalidatedRect;
     const char * shutdown = nullptr;
+#if defined(HARDWARE_TOUCH)
+    bool touchEnabled = true;
+#endif
 };