webadmin: css: make profile selection in "add users and groups" dialog wider.

Widening the parent div prevents misalignment in locals
where The 'Search:' label is longer than english (e.g fr).

Change-Id: Id4b46a36bd676605067706b718ad8893f470ffab
Bug-Url: https://bugzilla.redhat.com/show_bug.cgi?id=1123780
Signed-off-by: Mooli Tayer <mtayer@redhat.com>