mastodon features i want that are probably not too difficult to implement but i'm not sure i could add myself:
1. option to have the post button greyed out until i've chosen if i want it public/private/unlisted (so basically remove the default and choose every time)
2. option to, despite what i just said, have replies default to the same public-ness level as the post they're replying to (or maybe just show in the posting ui, what the public-ness level of whatever i'm replying to is)