Update to latest libopenui

radio/src/opentx.cpp

@@ -1902,6 +1902,7 @@ void opentxInit()
   TRACE("opentxInit");
 
 #if defined(LIBOPENUI)
+  new MainWindow();
   new ViewMain();
 #elif defined(GUI)
   // TODO add a function for this (duplicated)
@@ -2260,7 +2261,7 @@ uint32_t pwrCheck()
   else {
 #if defined(COLORLCD)
     if (pwr_press_time != 0)
-      mainWindow.invalidate();
+      MainWindow::instance()->invalidate();
 #endif
     pwr_check_state = PWR_CHECK_ON;
     pwr_press_time = 0;