LPS-32365 Use different icons for Assign Site Roles and Remove Membership
LPS-32365 Wrong format of implicit site membership message when there is more than one name
LPS-32365 Check if user is member of the site's organization.

An organization A  can be related to a site B in two different ways: (1) A is member of the B. (2) B is the site of A. In both cases, users of A are implicit users of B. Previously to this change, only (1) was considered.
LPS-32365 Use the same method for searching userGroups.

To search or count all userGroups regardless of their name and description, use the search by keywords=null instead of search by name=null, description=null.
LPS-32365 Remove unused methods
LPS-32365 The Remove Membership action shouldn't be displayed for implicit Site Members

This solution follows the same pattern as in the sites view (see site_actions.jsp, site_columns.jspf)  in case of implicit membership: (1) Display help message. (2) Hide some actions.
LPS-32365 Format source
LPS-32365 Regenerate