Return to the watches list after viewing an issue

The following enhancements would be nice to have in watches list (UserWatches!default.jspa):
1/ Sort by columns - especially useful when you watch a lot of issues and you want to sort them by project, name or status.
2/ Bulk un-watch - for example to have checkboxes or something alike, in order to be able to un-watch more then one issue at once.
3/ Remembering on what page the browser was on watches list. For example when "un-watch" is clicked to be returned to the same page (if possible) or when issue is opened, and "return to" is clicked, to be returned to the same page of watch list.
4/ When you open an issue from Watches list, to have "Return to" link which to go back to watch list, not to latest search filter (not sure if bug or enhancement)