Groups in Media Picker and Image Cropper crops

[bjarnef]

I wonder if we can use the concept with groups with Block Grid property editor in Media Picker local crops and Image Cropper crops.

To make it backward compatible the crops can still exists at root, but often I have seen the need to define many crops.

Instead of listed all crops, it could eventually group these, e.g. "Desktop" and "Mobile".

Maybe the content editor then need to select "Desktop" group the edit the three crops in this group or another way the filter specific crops.