set fact to False before deleting cards

ankiqt/ui/cardlist.py

@@ -818,6 +818,9 @@ where id in (%s)""" % ",".join([
         except:
             # card has been deleted
             return
+        # ensure the change timer doesn't fire after deletion but before reset
+        self.editor.saveFieldsNow()
+        self.editor.fact = None
         self.dialog.tableView.setFocus()
         self.deck.setUndoStart(n)
         self.deck.deleteCards(cards)

ankiqt/ui/facteditor.py

@@ -477,7 +477,7 @@ class FactEditor(object):
 
     def onFocusLost(self, widget):
         from ankiqt import mw
-        if self.fact is None:
+        if not self.fact:
             # editor or deck closed
             return
         if mw.inDbHandler: