1. fixed checkbox focus on touch

2. fixed crash if you edit a textbox and close the simu.  TextEdit changeEnd() wasnt checking lvgl for validity
3. removed dead code in new TextEdit onTouchEnd()

radio/src/thirdparty/libopenui/src/checkbox.cpp

@@ -85,3 +85,15 @@ void CheckBox::onEvent(event_t event)
 }
 #endif
 
+#if defined(HARDWARE_TOUCH)
+bool CheckBox::onTouchEnd(coord_t x, coord_t y)
+{
+  if (!hasFocus()) {
+    setFocus(SET_FOCUS_DEFAULT);
+  }
+
+  return true;
+}
+#endif
+
+