fix #6857

also display message if the user has no invitations left and refactored
InvitationsController spec and remove unused message parameter

otherwise the counter goes into negative ;)

also  reset all negative counters

Fixes #5116

Fixed:
* wrong url
* broken navigation
* broken design
after saving the user settings

Fixes #5847

Updates introduce usage of client-side aspect dropdown rendering

And remove the note_html property from the model.

Updates introduce support for preloading contacts to Gon in order
to support client-side rendering of aspect membership dropdown box.

in order to support adding new aspect to a dropdown without full
page reload

* Fix issue #6847

Send a second message to remote recipients with conversation-author
as salmon author if the conversation-author is local.

The first dispatch will fail on old pods. New pods will ignore the
second message, if the guid already exist.

this creates inconsistent states, if you remove the block in the future

move it to Diaspora::Federation::Entities and use it in some tests, but most of the tests can be removed later.

closes #6817

There is no point to redirect to "/stream" after the account deletion
because the user is logged off.

* find returns nil if nothing found
* find! raises errors if not found or not visible

this is not used anymore:
* not logged in users are redirected to the login page
* logged in users see the normal 404 page

* move presenters back to controllers, this is view-logic
* use PostService in CommentService
* remove iframe route, this is not used anymore
* id/guid limit at 16 chars, hex(8) is 16 chars long

* move parameter normalization back to controller, because this is
  frontend-specific.
* if the StatusMessage is public, save also public photos

* use port for check
* respect entries in /etc/hosts
* test /.well-known/host-meta
* don't allow redirects to other domains

Only mark unread notifications as read otherwise, the UPDATE statement would update all the notifications...

closes #6711

closes #6710