* Add a menu option to mute / filter a hashtag from a status list
Un/muting uses the "home" filter
* Set the initial mute button visibility from existing filters
Check the user's filters to see if the tag is already filtered from HOME.
If it is then the initial button is to unmute it. If it isn't then the
initial button is to mute it.
* Avoid "mute tag" menu items "popping" in
- Initial state shows the "mute" option, disabled
- Update the state after the API call completes
* Add support for following hashtags. Addresses #2637
* Update rxjava to coroutines
* Update new tag api to use suspend functions
* Update hashtag unfollow icon
* Set correct tint on hashtag follow/unfollow icons
* Translate hashtag follow/unfollow error messages
* Toast => Snackbar
* Remove unnecessary view lookup
Nik Clayton
Levi Bard