Export all vital data from browser via "Export JSON" instead of just those that have been processed

[tricky-labyrinth]

Before you start.

• [x] I have checked the Rejected Features page.
• [x] I have searched the issue tracker for a feature request that matches the one I want to file, without success.

My great idea for Fraidycat is: This suggestion was given here: https://github.com/kickscondor/fraidycat/issues/187#issuecomment-734505155 with a response from the repo owner here: https://github.com/kickscondor/fraidycat/issues/187#issuecomment-736691483 Just moving this to its own issue so it gets properly tracked.