handle blur/key event before note id set

can't reproduce the issue here, but presumably this change will
work around
https://anki.tenderapp.com/discussions/ankidesktop/33038-bug-after-updatehtml-notes-wont-display

aqt/editor.py

@@ -248,7 +248,10 @@ class Editor:
         if cmd.startswith("blur") or cmd.startswith("key"):
             (type, ord, nid, txt) = cmd.split(":", 3)
             ord = int(ord)
-            nid = int(nid)
+            try:
+                nid = int(nid)
+            except ValueError:
+                nid = 0
             if nid != self.note.id:
                 print("ignored late blur")
                 return