Re-work indentation and fix display group detail if there is no group_type
Use the group name if there is not display_name

And avoid repeating the group name in this case
Put a place holder if there is no group type
Wrap a little the longest line in the documentation of the theme
Merge branch 'fas3_pingou_group_details' into FAS_3.0

    + Add missing double-quote from f2c7cc6c.