Improved list of applications + support for app-buttons

- Support for Mock and Openstack
- Improved all states from vizual side
- Added icons and styling for app-buttons (run, restart, pause, stop,
  delete)
- Improved toggle on provider application
- All in respect with basics for responsive webdesign
Updated gettext translations
Merge pull request #204 from jcoufal/applications_ux_enhancements

 Improved list of applications + support for app-buttons