Fixes #6357 - ensure JS is loaded so taxonomy_added is defined on user form
fixes #5969 - improve message when deleting virtual machines to indicate delay
Fixes #6532 - permission related api extensions

 - usergroups#show lists associated roles
 - listing available resource types
 - filters#show lists associated roles
 - filters#index lists associated roles and permissions and orders the results
 - pagination in permissions#index
 - missing parameters in apidocs for usergroups and roles
 - usergroups require name