Fix bug that triggers new submission on change.

fixes: https://github.com/GlobaLeaks/GlobaLeaks/issues/163
Merge branch 'master' of github.com:globaleaks/GLClient

* 'master' of github.com:globaleaks/GLClient:
  Add notes on submission interface on which file to modify
  Modify the submission Step 3 text from lorem ipsum
  updated view in admin mail, along with docs
  Receiver and Context need to be configured both
  Specify that one is hostname and the other is url
  Fix name in content settings
  improved tip list view