Allow components to be moved up the page tree

Right now there are buttons to move up and down an element among its siblings. But it is also a somewhat common need to want to move a component up the DOM tree so it becomes a sibling of the element that right now is its parent.

A component might be dropped into a position that is not optimal, for example a large CTA section might be dropped as a child of a small img which will cause it shrink and look broken because it does respect the parent's container rules.

So the Visual Editor should enable users to move components up the tree to allow placing them in the right spot, for example in the scenario described before it would move the CTA section out of the image into a div or a larger section of the page.