Thank you for this novelty! I was looking forward to this! 
To go further, when we have several elements to group together, it would be easier to select them all directly on the âlayersâ part of the control panel. Canât wait to see this in addition to the âgroupâ option!
You can check out this topic where I exposed the idea:
https://www.editorxcommunity.com/forum/wish-list/select-all-layers