Feature request: handle user overlays across projects on the same platform

Currently, when new versions of a project are uploaded to the same MINERVA PLatform, overlays have to be manually transferred. This is error-prone and time consuming, with data potentially propagating against users' intention. MINERVA should support easier handling of the user overlays within the same platform.

Suggested solutions:

Solution 1:

• user overlays are common across projects, visible for their owner on each project (on the same platform) the owner has access to.
• public/global overlays: a given overlay would be decided as public/global per project.
• challenge: removal of a single root overlay would result in removing it from other projects
  • suggestion 1: allow this behaviour under a warning prompt
  • suggestion 2: block a removal of an overlay until it's made private on all related projects

Solution 2:

• implement a functionality for user data transfer (in bulk) across projects
• challenge: this would be a manual solution, with data potentially propagating against users' intention