* Change remote interaction dialog to use specific actions
Instead of just "interact", use different strings based on whether
it's a reply, reblog or favourite. Add explanation why the step
is necessary in the first place
* Remove obsolete strings
* Add follow button to detailed status, add gradient to mask bio cut-off
* In landing strip, show sign up link even if closed (different href)
Point to joinmastodon.org
* Make embeds cacheable by reverse proxy
* Make follow button on embeds open remote follow modal
Instead of web+mastodon://, also, turn the button blue, and add a
sign up prompt to the remote follow modal
