Option to add default label to added papers

general
under-review

#1

I usually dump papers in my library with the intention to read them later, but then risk forgetting them.
Is it possible to add a (user definable) label to them, defined in the settings page. Implementing Add tags and folders when importing from Chrome extension would be better of course, but this might still be interesting for papers added by email, and it would be very quick to implement I imagine :wink: