Strip user names

Looks like somehow some people get newlines into their user names so
just strip them and hope they never appear in the middle.
TweetListEntry: Fix indicator alignment
Merge branch 'master' into main-widget
ProfilePage: Move the spinner into a stack

... so we don't move widgets around when showing/hiding it.
ProfilePage: Don't show the progress spinner...

... if we already have data of that user in the database.
profile-page: Add some margin-end to the avatar
Add AddFilterEntry

There's another use case for 'generic list row that adds something'
comiung up.