UI: new bugs

[daniel-arnauer]

It is not possible to add the permissions global.enableUser and global.disableUser in UI
Closed resources must be ignored when checking assignments (API level bug)
After canceling the window to add global permissions, the userlist re-fetches, this is not necessary
The CSS Layout in "Add User" window is broken
When disabling/enabling an user, a confirmation dialog should appear
Instead of showing the assignments in the snack bar, the assignment should be listed within the confirmation container