XX-10781: LDAP search filter limited to 256 characters

-remove 256 length filter limitation from both UI and DB
-filter is now a text area field instead of text input
-remove .jwc entry for filter, add it in html only
-replace e.getCause().getMessage() with e.getMessage() when throwing UserException
because e.getCause() might return null
Merge branch 'XX-10781' of github.com:dhubler/sipxecs into XX-10781

Conflicts:
	sipXconfig/etc/sipxpbx/database/database.xml