Use Hand/Move cursor for block library

I filed a PR that adds hover styling to the block sidebar and to the drop targets. The styling is very basic but it's a substantial UX improvement to give users visual indication both that a block is draggable and that a drop zone is droppable.

Reviewed and tested the MR. It helps improve the UX and makes it easier for users to navigate through the layout builder. attaching before and after gif to show the improvements in UI.

RTBC++

Oh yes, that is so much nicer! Thank you!

Thanks Tim!

Automatically closed - issue fixed for 2 weeks with no activity.