feat(roles): Implement basic user roles settings

+ Remove old code
+ User roles list view
+ create/edit/delete user roles

SD-829, SD-831
Merge remote-tracking branch 'nikola/user-roles-ui' into devel
fix(autosave): use only POST for autosaving

SD-657
fix(tasks): make picking a task just open an item

it locks it on opening so there is no need for other requests