Hardcoded "My Watches" and "My Votes" screens

Screens My Watches and My Votes look very similar to Issue Navigator, but cannot configure them or work like I am accustomed to doing on Issue Navigator screen -

• cannot add/remove columns in issue grid; where is it defined which columns to show on these screens?
• issues are not sortable, column captions are not clickable.
• no number of issues shown;

I have hundreds of watched issues in several projects and review them regularly unwatching resolved issues and editing/commenting overdue ones.
Lack of said functionality very complicates my work.

PS: I lodged this issue as bug, not as improvement since I think this usability bug - screen looking like Issue Navigator is not that, but something hardcoded.

PPS: Seems the reason having these screens is JIRA does not allow to filter issues by "Voted" and "Watched" sign. Better to extend filtering functionality and get rid of these screens.