Fix for window being placed badly on the screen when returning to board mode...

Fix for window being placed badly on the screen when returning to board mode from desktop mode on some environments

src/core/UBApplicationController.cpp

@@ -375,7 +375,7 @@ void UBApplicationController::showBoard()
 
     mUninoteController->hideWindow();
 
-    mMainWindow->show();
+    UBPlatformUtils::showFullScreen(mMainWindow);
 
     emit mainModeChanged(Board);
 

src/desktop/UBDesktopAnnotationController.cpp

@@ -411,13 +411,7 @@ void UBDesktopAnnotationController::hideWindow()
 
 void UBDesktopAnnotationController::goToUniboard()
 {
-    onToolClicked();
-    hideWindow();
-
-    UBPlatformUtils::setDesktopMode(false);
-    UBDrawingController::drawingController()->setInDestopMode(false);
-
-    emit restoreUniboard();
+    UBApplication::applicationController->showBoard();
 }