Change: show count on system groups/users and toggle users on by default

[DaveDarsa]

closes #270

[shreddedbacon]

On organizations/${org}/users "Show default users" should be unticked by default. If the count of non default users is 0, then it should be ticked.

On organizations/${org}/users/${emailaddress} "Show system groups" should be unticked by default. If the count of non system groups is 0, then it should be ticked.

On organizations/${org}/projects/${projectname} "Show system groups" should be unticked by default. If the count of non system groups is 0, then it should be ticked.

On organizations/${org}/groups/${groupname} "Show default users" should be unticked by default. If the count of non default users is 0, then it should be ticked.

[shreddedbacon]

The count shown in the tick box label is great though!

[shreddedbacon]

On organizations/${org}/groups/${groupname}, the list of projects has a tick box to Show system groups. But this isn't required on this table, projects are just projects

[shreddedbacon]

Works for me