Contact edit Groups pane : use crmasmSelect widget instead of list of checkboxes

Log hours to Bluebird issue: http://dev.nysenate.gov/issues/6102
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When on the full Edit screen for a contact record, in the Tags and Groups section, all existing groups are currently displayed in a single column. This interface is problematic when the number of groups exceeds 10 or so. Replace with the crmasmSelect widget we currently use in Advanced Search. Only groups that the contact is currently a member are listed when pane loads. User adds groups from 'select', and removes by clicking 'x' next to group name.