Fix for desktop mode partial screen capture taking an offset image of the desktop

src/desktop/UBDesktopAnnotationController.cpp

@@ -334,7 +334,8 @@ void UBDesktopAnnotationController::showWindow()
 #ifndef Q_OS_LINUX
     UBPlatformUtils::showFullScreen(mTransparentDrawingView);
 #else
-    // this is necessary to avoid unity to hide the panels
+    // this is necessary to avoid hiding the panels on Unity and Cinnamon
+    // if finer control is necessary, use qgetenv("XDG_CURRENT_DESKTOP")
     mTransparentDrawingView->show();
 #endif
     UBPlatformUtils::setDesktopMode(true);
@@ -431,7 +432,7 @@ void UBDesktopAnnotationController::customCapture()
     // need to show the window before execute it to avoid some glitch on windows.
 
 #ifndef Q_OS_WIN // Working only without this call on win32 desktop mode
-    customCaptureWindow.show();
+    UBPlatformUtils::showFullScreen(&customCaptureWindow);
 #endif
 
     if (customCaptureWindow.execute(getScreenPixmap()) == QDialog::Accepted)