User name tooltips for notifications and repeats

See merge request !84

Add mouseover tooltips for names in notif headings and timeline repeats, make the timeline repeat name into a link to the repeater profile and use the word 'repeat' instead of 'retweet'.

Status improvements and cleanup

See merge request !83

Make text input grow to a minimum height of 3 lines on focus

See merge request !82

Move a bunch of status-related styles from App to status component, alter status header layout for better user experience hopefully, make status actions placing more consistent, adjust margins.

Feature/notification improvements

See merge request !79

Add a custom timeago.json for shorter timestamps, for example '15s' instead of '15 seconds ago'

See merge request !80

Make post-status-form textarea automatically resize to fit the input.

See merge request !81

Merge branch 'develop' of ssh.gitgud.io:lambadalambda/pleroma-fe into feature/notification-improvements

Enable reply/rt/fav for mention notifications by using a barebones status in place of plain notification content.

Alternative autocompletion is in the works and this one has injection problems.

Polish up post-status form

See merge request !78

Fix the floating 'remove attachment' icon on post status form.

See merge request !77

Fix / add explicit lang="en" to html

See merge request !75

Reply navigation fix for opening conversations in new tab

See merge request !74