Is there a way to right click a selection of mesh and send to a specific layer?

As far as I know, the layer system is not supported anymore. All slices are per default added to the main layer so you can keep track of the objects added to a level in the level list, but you cant change the layers. Not 100% sure about that because I am mostly coding, but you might wanna look into the slice system on how to create hierarchies and simultaneous work on one level with your team.