Users should be able to edit their own labels from their dashboard

[misaugstad]

Brief description of problem/feature

We want to add the ability for users to filter by validated correct/incorrect on their user dashboard map (#2811). Once they do that, they should be able to edit or delete their labels from there (but they shouldn't be able to validate them)!

This should also be added in to all versions of LabelMap (for Admins only for now), though what we do on the back end will be different depending on who's doing the label editing. If an admin is editing someone else's label, it will probably be entered in as a "validation" in the db.