Post UI updates (Profile Preview on mobile) (#990)

* Update postmeta to put the timestamp on the right side on mobile

* Drop the two-line PostMeta mode

* Add ProfilePreview modal

* Tune PostMeta to give the best behavior possible for a given platform

* Remove old showFollowBtn attributes

* Fix style issue

* Switch the follow button in the profile header to use the inverted color for consistency with the rest of the app

* Fix lint

* Fix darkmode

* Tune the profile preview footer

* Better analytics choice

src/view/com/post/Post.tsx

@@ -229,7 +229,6 @@ const PostLoaded = observer(
               authorHasWarning={!!item.post.author.labels?.length}
               timestamp={item.post.indexedAt}
               postHref={itemHref}
-              did={item.post.author.did}
             />
             {replyAuthorDid !== '' && (
               <View style={[s.flexRow, s.mb2, s.alignCenter]}>