Custom Collections sort order

I'd like to have possibility to sort collections in the admin's panel collections view in a different way than by Date (default) or Name.
I'm just thinking of the similar way, like ordering files attached to object. There is possible to set custom order of files displayed for each item.
I'd like to order collections manually, by their personal meaning (some collections are more important to me, no matter when they were added and what names they have, and I'd like to have them always on top of the list for fast access).
Is there a plugin that adds such functionality, or someone is working on it? Maybe it could be considered in a future Omeka release?