(Feature Request) Please add a settings import/export

• Device OS and version: Oreo 8.1.0
• Device model/manufacturer: Poblano VLE5 (Hot Pepper)
• F-Droid version (in the About screen): 1.8
• F-Droid privileged extension version (if installed): n/a

What did you do? (clear steps if possible)

While checking the storage, I see that F-Droid is rather large. (see attached screenshot)

What did you expect to see?

A normal sized appstore, such as ApkPure, UpToDown, or Google Play Store.

What did you see instead?

F-Droid is almost twice the size of the above mentioned appstores.