Fixes issue #189 - webadmin: show in user page if the module is already loaded as global module

Provide user with visual clue whenever module is already loaded.
The following behavior is implemented:
Global page: 
- column "Loaded by networks" indicates whenever module is loaded by all or the some of the networks.
- column "Loaded by users" indicates whenever module is loaded by all or some of the users.
Network page:
- column "Loaded globally" indicates whenever module is loaded globally.
- column "Loaded by user" indicates whenever module is loaded by the user of this network.
User page:
- column "Loaded globally" indicates whenever module is loaded globally.
- column "Loaded by networks" indicates whenever module is loaded by all or the some of the networks.
In order to indicate "some" check box's indeterminate state is being used.