fix(overlays): displaying users overlays (MIN-280)

1. Fixed displaying user overlays and showing them in the correct order after general overlays.
2. Fixed displaying user overlay legend.
3. Added the ability to create a user overlay without description and added refetch of user overlays after creation, so that the user always has an up-to-date list of user overlays.

user-overlays-order

overlay-desc

Closes: MIN-286 MIN-280