...I was in touch with 'support' who indicated it has a 'bz' number for being re-implemented in a next version but I can't find any time frames. I even tried the 'issue tracker' on this web site searching product 'studio' for 'bookmarks' but find nothing!? (maybe it doesn't hold issues with 'bz' numbers?).
... the Issue Tracker hooks into the Bugzilla database. If I give you a Bz number and it doesn't appear in the Issue Tracker it normally means that the issue is still marked as Internal only (the default setting). In this case the number I gave you 14941 is marked as internal only (perhaps it shouldn't be as it was raised during an eap), but it does indicate that it has been checked into the GST 2.30 release which is work in progress. Any time frame will be based on when GST 2.30 is intended to be released.