The issue popup menu is great for many things, but these options I find myself lacking.

Below or above the current Watch/Copy/Delete items.
For example:

• Accept/Begin/Start Work, visible if the issue is in status New. Set status to In Progress. Assign it to the current user. Probably allow for a comment to be added.
• Resolve, visible if the issue is in status In Progress. Set status to Resolved. Probably allow for a comment to be added.

... and probably others.

Perhaps they could be possible to enable/disable by configuration, or even better be completely customizable (name, set status, assign, comment etc).

I hope I'm making myself understood without mockups.