Merge branch 'master', remote-tracking branch 'remotes/upstream/master'

* remotes/upstream/master:
  support autocomplete @-tags in plaintext mode
  vier navbar messed up after default theme template move
  profile_tabs hook
  use theme directory for page templates, not language directory
  turn on gecko spellcheck in tinymce
  small fix in diabook
  fixes in diabook
  provide a close-option for boxes in right_aside and store info via js and cookies
  provide a close-option for boxes in right_aside and store info via js and cookies
  form security error when using existing photo

* master: