Describe the bug
When exporting annotation with Flashcard, the JSON line is undefined

    },
    undefined,
    {

To Reproduce
Steps to reproduce the behavior:

1. Annotate a line of text
2. Add a Flashcard with data on back and front
3. Export annotation as JSON
4. Search "undefined" you should get to that badly exported entry

Expected behavior

Fla

After this MR, the custom font loading is not tested by visual regression tests: kantord/LibreLingo#740

To still tests font styles, create a special test:

• The page should be tested using Percy, the same way the other pages are
• Create a page, which has exam

When I start Anki 2.0, "Your Incremental Reading settings file has been modified for compatibility reasons. …", and my custom QuickKey is not there when I start Anki 2.1 after that.

Right now when the user logs out, the Decks widget looses access to the list of decks, making Firebase trigger permission denied events. This results in issue churn:

• https://sentry.io/share/issue/c903ffaafb1d4f09903b614cfc6bdba5/
• https://sentry.io/share/issue/e687924953344d13960ac45ba0794877/
• https://sentry.io/share/issue/a69efe18a23945cbb5cbfe3bf7072340/

We should not receive except