Revert "Rename 'Full Screen' occurrences to 'Entire Desktop' to have it consistent everywhere"

This reverts commit 526b1e90.

It did not solve the problem described in bug 422052 :(

src/SpectacleCore.cpp

@@ -367,7 +367,7 @@ void SpectacleCore::doNotify(const QUrl &theSavedAt)
 
     switch(ExportManager::instance()->captureMode()) {
     case Spectacle::CaptureMode::AllScreens:
-        lNotify->setTitle(i18nc("The entire desktop was captured, heading", "Entire Desktop Captured"));
+        lNotify->setTitle(i18nc("The entire screen area was captured, heading", "Full Screen Captured"));
         break;
     case Spectacle::CaptureMode::CurrentScreen:
         lNotify->setTitle(i18nc("The current screen was captured, heading", "Current Screen Captured"));