Sort profiles in the Backup Now tray menu (borgbase#1899)

The profile list in the main window is already sorted by name (alphabetically, case-sensitive). However the profile list in the *Backup Now* action found in the tray menu wasn't. This commit constructs the sql query to return the profiles in order.

* src/vorta/tray_menu.py

src/vorta/tray_menu.py

@@ -59,7 +59,7 @@ def build_menu(self):
             cancel_action.triggered.connect(self.app.backup_cancelled_event.emit)
         else:
             status.setText(self.tr('Next Task: %s') % next_task_time)
-            profiles = BackupProfileModel.select()
+            profiles = BackupProfileModel.select().order_by(BackupProfileModel.name)
             if profiles.count() > 1:
                 profile_menu = menu.addMenu(self.tr('Backup Now'))
                 for profile in profiles: