Feature Idea - Selection Editor tool - support selecting multiple entities

[anotherhale]

There is a need to be able to select multiple entities at once to move them or perform other operations on them as a group. I think initially this would just be a rectangle selection, similar to the zoom to feature, but possibly be able to have other selection methods (freehand, elliptical, selectByType, etc) similar to GIMP or other drawing applications.

I can assist with this PR.

[eitanfr]

It sounds like a cool idea. back in the day, we did a simple implementation for it, in SelectionManagerService, checkout the example here. You can expand this service or create a new util service, we welcome PRs :)