improve copy and paste experience+issues

When I copy from a card's view mode and paste it somewhere it has a bunch of spans which can mess things up.

When I paste from a URL copied from another card's arrow link to the TinyMCE editor the link does not paste at all. I would expect it to paste, but to convert the link to the shortest form possible, taking out the server name if I pasted from and to the same server, leaving me with a /relativelink