[Feature Request] Introduce folders to better organize and categorize pinned subreddits

[tokariu]

If the list of pinned subreddits grows over time it becomes cumbersome to find and visit subreddits.

The List of pinned subreddits should be managed in folders which the user then could name like categories. The folders could be collapsed or unfolded as we like and we can finally navigate to the pinned subreddits much easier.

[PaxVobiscuit]

I'd be happy to see this as well, or the option to have different pinned subreddits for each account.