Allow for drag-n-drop of tables onto other pages

[DANNYVV]

I discovered I could do it via Cut & Paste (even on Web UI, Awesome!!!!) but my initial attempt was to use Drag&Drop. This might make it easier for users that are not familiar with the keyboard. Especially people using WebUI would not have assumed it would work. I only discovered it worked because I know the teams behind PowerBI are awesome 😉