Merge pull request #4844 from svbergerem/new-publisher-fix-button-height

Fix different button sizes in new publisher
Show hovercards in the notification drop-down for users on the same pod
Fix atom feed for reshares of deleted posts.

Propose for fix #4638

Added Changelog line

Added Specs for testing if the reshared origin post is deleted and therefore not shown in the atom feed
Merge branch 'MatrixCrawler-4638-Atom-Feed-Error' into develop
Merge pull request #4843 from svbergerem/4228-hovercards-same-pod

Show hovercards in the notification drop-down for users on the same pod

Conflicts:
	Changelog.md
Port notifications to Bootstrap and add filters
add hovercards