Runestone Issue: accessibility issues in Horizontal Parsons

[ascholerChemeketa]

Horizontal Parsons problems lack essential accessibility features.

Both block areas should be tab stops. Within an area, arrows should move from block to block and space/enter should move the block to the other area.

There also should be non-visual feedback while navigating between blocks and when blocks are moved.

[bnmnetp]

@barbarer - any of your students looking for projects? We need to keep accessibility in mind for everything going forward.

[pearcej]

I've got students who will be working this summer. Maybe one of them can take this on.