admin: Align item properties with the rest of code

Fix apyrgio/synnefo#78
Merge branch 'feature-admin-rename-project-properties' into feature-admin
admin: Prepare user view for "Select all" ops

In the user json view, check if the incoming request is paginated or
not. If it isn't, then calculate only the necessary data.

This change aims in improving the server response.
Merge branch 'feature-admin-select-all' into feature-admin
admin: Update project filters

Enable filtering by project/application status or by "is_base"
property.

Fix apyrgio/synnefo#75 and also fix apyrgio/synnefo#95.
Merge branch 'feature-admin-project-filters' into feature-admin
admin: Update user log in details

Add all date-related information in the "Log" section.
Also, update project/user details to user `status_display` instead of
custom template tag `get_state`.

Fix apyrgio/synnefo#99
admin: Remove old template tags
Merge branch 'feature-admin-user-log' into feature-admin
admin: Update action metadata

Change reversible to caution_level and adapt the views where necessary.

Fix apyrgio/synnefo#86
Merge branch 'feature-admin-action-metadata' into feature-admin