Don't emit appletDeleted 2 times
if we do deleteLater() and then emit appletdeleted, it will emit again appletdeleted when the applet gets actually deleted, this causes a series of events that will mark the systemtray as hidden when this happens
(cherry picked from commit 6c63a6fc)
6c63a6fc Don't emit appletDeleted 2 times
Co-authored-by: Marco Martin notmart@gmail.com