[Feature Request] Linked Layer Sets

[lrwerewolf]

While editing multi-layer designs, it would be useful to be able to declare that a given collection of layers be kept in sync. For example, one may have a reactor cell layer set and a moderator layer set, and changes to any layer in the reactor cell layer set is made to all layers in the set. Likewise, any change to a layer in the moderator layer set is made to all layers in the moderator layer set.

Ideally, this could be named according to the user's discretion. However, even a predetermined limited number of sets, such as "Set 1" and "Set 2" (and so on...) would be useful.

One way to implement this in the UI could be to create a drop down box in the Edit / Manage / Layer # bar. The drop down could have 'Independent' by default, with any sets (named or otherwise) below. When a layer is added to a set, it should be changed to match the existing set members (this avoids accidentally clobbering work on the set already done by a user adding a significantly different layer).