[UX] Views save/cancel buttons are at the top right

Describe your issue or idea

From https://github.com/backdrop/backdrop-issues/issues/541#issuecomment-6868...

We have problems with the location of the submit button in views, too. It's the only UI in core that puts those buttons at the top right.

If your live preview is too wide, the page gets a horizontal scroll bar, and the buttons disappear entirely (because people don't ever think to scroll to the right). This was a major UX fail when we did usability testing on views module in Drupal 7.