Customize the global default kanban sub-filter

Would like the option for JIRA Administrators to be able to specify the default global kanban sub-filter used to seed new kanban boards.

The issue we're seeing is, people create a few boards for a Project and when one of them creates a Release to clear things from their board, it disappears from everyone else's board. Additionally, if people create boards that span Projects which they may not be Admins in, they cannot create Releases in those Projects and thus get an error when they try to create a Release on their board.

So the current default sub-filter is sub-optimal for us and we'd like to change it to something like:

resolution is EMPTY OR (resolution is not EMPTY AND resolved > -7d)

so as to have things drop off our Kanban board automatically after 7 days which is a more logical way to manage a Kanban board rather than having to constantly create Releases to clear it. And we'd like the ability to make that the default so we don't have to constantly have users 'fix' their kanban boards.