Allow to disable the plugin for defined <select multiple> form fields
with extra css class 'dont_use_bsmselect'. (E.g. not for the group form
fields permissions and users.)
Partly fixed changes from pull request #1381.
- Fixed js error on dashboard page if no cookie is found.
- Use cookies only until end of session. For dashboard cookies use url /dashboard only.
- Updated permission numbering of builtin groups and added can_use_chat permission.
- Used minified version of jquery.cookie.
- Added TODO comment for django session way from pull request.
- rename static subdirs to css and js
- move global static dir to core/static, changed
- move global templates dir to core/templates
- check comments and code style of all our own CSS and JS files
- minor changes related to the changes of template and static files