closes #7061

Also remove confirm_email_token when unconfirmed_email is removed.

Fixes #7048

closes #7051

closes #7043

Fixes #6999

closes #7036

I got feedback from many users, that they don't understand how the "my
activity" stream is sorted, because they have posts on the top, but
don't see why. The user doesn't see if a like was added, and it is also
not imported for the user to see the post again then. And we have
notifications if someone likes a users own posts, so no need to move it on
top of the "my activity" stream here too.

closes #7030

Related issue: https://github.com/twbs/bootstrap/issues/15958

closes #7055

closes #7050

See http://guides.rubyonrails.org/security.html#cross-site-request-forgery-csrf

closes #7042

closes #7040

closes #7045

closes #7049

closes #7054

* fixed old reshares of reshares
* fixed deleted root of a reshare

* Adds a new metadata helper and methods to PostPresenter to have metas on post pages.

* Adds tests to post controller to check correctness of metas

* Add methods to PersonPresenter to have metas on profile pages

* Correct meta data helper test

* Update PersonPresenter, add test to PeopleController

* Creates TagPresenter. Display tag metas on tag index page

* Updata meta data helper spec

* Not displaying bio as the description meta on profile page for now. Privacy concerns to be cleared.

* Set meta info as hashes in presenters

* Move original hardcoded metas info to config/defaults.yml

* metas_tags include by default the general metas, update views

* Update code style, clean views

* Renames TagPresenter StreamTagPresenter, updates TagController spec

* Add a default_metas entry to diaspora.yml.example

* Align metas hash in presenters, refactor meta data helper

* Use bio as description meta if user has a public profile

* Rename StreamTagPresenter to TagStreamPresenter

DRY

fix #6989