Fix notifications from calibre being displayed as "Others" on the GNOME desktop

Merge branch 'gnome-notifications-fix' of https://github.com/Djaler/calibre

src/calibre/gui2/notify.py

@@ -76,7 +76,7 @@ class FDONotifier(DBUSNotifier):
         timeout, body, summary = self.get_msg_parms(timeout, body, summary)
         try:
             self._notify.Notify('calibre', replaces_id, self.ICON, summary, body,
-                self.dbus.Array(signature='s'), self.dbus.Dictionary(signature='sv'),
+                self.dbus.Array(signature='s'), self.dbus.Dictionary({"desktop-entry": "calibre-gui"}, signature='sv'),
                 timeout)
         except:
             import traceback

src/calibre/linux.py

@@ -1039,6 +1039,7 @@ TryExec=calibre
 Exec=calibre --detach %F
 Icon=calibre-gui
 Categories=Office;
+X-GNOME-UsesNotifications=true
 '''