Add Cards save the previous note

aqt/addcards.py

@@ -28,6 +28,7 @@ class AddCards(QDialog):
         self.setupButtons()
         self.onReset()
         self.history = []
+        self.previousNote = None
         restoreGeom(self, "add")
         addHook('reset', self.onReset)
         addHook('currentModelChanged', self.onModelChange)
@@ -83,6 +84,7 @@ class AddCards(QDialog):
     def onModelChange(self):
         oldNote = self.editor.note
         note = self.mw.col.newNote()
+        self.previousNote = None
         if oldNote:
             oldFields = list(oldNote.keys())
             newFields = list(note.keys())
@@ -176,6 +178,7 @@ question on all cards."""), help="AddItems")
             return
         self.addHistory(note)
         self.mw.requireReset()
+        self.previousNote = note
         return note
 
     def addCards(self):