Add support for starred / favorite items

[uraza]

Hi.

I discovered this app on F-Droid recently and I like it very much.

Is your feature request related to a problem? Please describe.
I noticed that it is possible to add a star on an item, but I did not find a way to view all the starred items.

Describe the solution you'd like
It works be great to have a tab where only starred items are displayed.

Thanks a lot!

[uraza]

Found it on the main "Feed" tab, there is an option to show "Starred only".