Activated 'maskUpdate' for MAC + QT >= 5.10, which solves MAC desktop

issue, where events would not be propagated to apps on the background
(cf https://bugreports.qt.io/browse/QTBUG-81456).

src/core/UB.h

@@ -35,6 +35,10 @@
 
 #define UB_MAX_ZOOM 9
 
+#if defined(Q_OS_LINUX) || (defined(Q_OS_OSX) && (QT_VERSION >= QT_VERSION_CHECK(5, 10, 0)))
+#define UB_REQUIRES_MASK_UPDATE 1
+#endif
+
 struct UBMimeType
 {
     enum Enum

src/desktop/UBDesktopAnnotationController.cpp

@@ -86,19 +86,7 @@ UBDesktopAnnotationController::UBDesktopAnnotationController(QObject *parent, UB
     mTransparentDrawingView->setAttribute(Qt::WA_MacNoShadow, true);
 #endif //Q_OS_OSX
 
-#if defined(Q_OS_OSX) && (QT_VERSION >= QT_VERSION_CHECK(5, 10, 0))
-    /* https://bugreports.qt.io/browse/QTBUG-81456 */
-    if (QOperatingSystemVersion::current().minorVersion() > 12) /* > Sierra */
-    {
-        mTransparentDrawingView->setWindowFlags(Qt::FramelessWindowHint | Qt::WindowStaysOnBottomHint | Qt::Window | Qt::NoDropShadowWindowHint | Qt::X11BypassWindowManagerHint);
-    }
-    else
-    {
     mTransparentDrawingView->setWindowFlags(Qt::FramelessWindowHint | Qt::WindowStaysOnTopHint | Qt::Window | Qt::NoDropShadowWindowHint | Qt::X11BypassWindowManagerHint);
-    }
-#else
-    mTransparentDrawingView->setWindowFlags(Qt::FramelessWindowHint | Qt::WindowStaysOnTopHint | Qt::Window | Qt::NoDropShadowWindowHint | Qt::X11BypassWindowManagerHint);
-#endif
     mTransparentDrawingView->setCacheMode(QGraphicsView::CacheNone);
     mTransparentDrawingView->resize(UBApplication::desktop()->width(), UBApplication::desktop()->height());
 
@@ -124,7 +112,7 @@ UBDesktopAnnotationController::UBDesktopAnnotationController(QObject *parent, UB
         connect( UBApplication::boardController->paletteManager()->mKeyboardPalette, SIGNAL(keyboardActivated(bool)), 
                  mTransparentDrawingView, SLOT(virtualKeyboardActivated(bool)));
 
-#ifdef Q_OS_LINUX
+#ifdef UB_REQUIRES_MASK_UPDATE
         connect(UBApplication::boardController->paletteManager()->mKeyboardPalette, SIGNAL(moved(QPoint)), this, SLOT(refreshMask()));
         connect(UBApplication::mainWindow->actionVirtualKeyboard, SIGNAL(triggered(bool)), this, SLOT(refreshMask()));
         connect(mDesktopPalette,SIGNAL(refreshMask()), this, SLOT(refreshMask()));
@@ -179,7 +167,7 @@ UBDesktopAnnotationController::UBDesktopAnnotationController(QObject *parent, UB
     connect(&mHoldTimerMarker, SIGNAL(timeout()), this, SLOT(markerActionReleased()));
     connect(&mHoldTimerEraser, SIGNAL(timeout()), this, SLOT(eraserActionReleased()));
 
-#ifdef Q_OS_LINUX
+#ifdef UB_REQUIRES_MASK_UPDATE
     connect(mDesktopPalette, SIGNAL(moving()), this, SLOT(refreshMask()));
     connect(UBApplication::boardController->paletteManager()->rightPalette(), SIGNAL(resized()), this, SLOT(refreshMask()));
     connect(UBApplication::boardController->paletteManager()->addItemPalette(), SIGNAL(closed()), this, SLOT(refreshMask()));
@@ -359,9 +347,9 @@ void UBDesktopAnnotationController::showWindow()
 
     mDesktopPalette->appear();
 
-#ifdef Q_OS_LINUX
+#ifdef UB_REQUIRES_MASK_UPDATE
     updateMask(true);
-#endif
+#endif // UB_REQUIRES_MASK_UPDATE
 }
 
 
@@ -404,9 +392,9 @@ void UBDesktopAnnotationController::updateBackground()
             || UBDrawingController::drawingController()->stylusTool() == UBStylusTool::Selector)
     {
         newBrush = QBrush(Qt::transparent);
-#ifdef Q_OS_LINUX
+#ifdef UB_REQUIRES_MASK_UPDATE
         updateMask(true);
-#endif
+#endif //UB_REQUIRES_MASK_UPDATE
     }
     else
     {
@@ -415,9 +403,9 @@ void UBDesktopAnnotationController::updateBackground()
 #else
         newBrush = QBrush(QColor(127, 127, 127, 1));
 #endif
-#ifdef Q_OS_LINUX
+#ifdef UB_REQUIRES_MASK_UPDATE
         updateMask(false);
-#endif
+#endif //UB_REQUIRES_MASK_UPDATE
     }
 
     if (mTransparentDrawingScene && mTransparentDrawingScene->backgroundBrush() != newBrush)

src/desktop/UBDesktopPalette.cpp

@@ -173,7 +173,7 @@ void UBDesktopPalette::minimizeMe(eMinimizedLocation location)
 
     adjustSizeAndPosition();
 
-#ifdef Q_OS_LINUX
+#ifdef UB_REQUIRES_MASK_UPDATE
         emit refreshMask();
 #endif
 }
@@ -203,7 +203,7 @@ void UBDesktopPalette::maximizeMe()
 
     // Notify that the maximization has been done
     emit maximized();
-#ifdef Q_OS_LINUX
+#ifdef UB_REQUIRES_MASK_UPDATE
         emit refreshMask();
 #endif
 }