[GUI] Fixing several design issues: line between calendars, language selector position, new collapse panel icon...
Merge branch 'master' of github.com:XIMDEX/ximdex

* 'master' of github.com:XIMDEX/ximdex:
  Patched fileupload-angular.
  Added query file upload and ladda buttons libraries.
  Minor style issue
  Added Angular library.
  Fix grunt file
  Update grunt to watch for sass changes
  Minor style issue