Globally :
- fixing Unit Test around Ffmpeg
- improving automatic popup sizing javascript method
- managing clipboard page as popup window
- fixing display in invite page on personal space (html tag were encoded)
On Contact feature :
- refactoring some code
- fixing some technical methods (equals and hashcode)
- adding some method javadoc comment
- fixing the alphabetical sorting
- fixing unit tests that were showing some problems around directory item aggregation
- fixing the email display of a contact when no email exists for a contact
- fixing a SQL query result
- fixing the directory item aggregation with contact item (contact item that represents an explicit user is ignored)
- modifying the directory result label
- providing fax information for contact fragments

feature #6027 : displaying contacts (from 'yellowpages' app) in global directory
feature #1406 : hiding empty form fields on view pages

init feature #5974 : contacts refactoring
Merge branch 'ney-feature-contactsInDirectory' into core-5.15.x