Consider side movers on spacer

[karmatosed]

The spacer block is incredibly useful if you are creating complicated layouts but it is somewhat problematic when you are in tighter spaces. For example, in a column block, above an image you get this:

I would suggest side or 'not central' movers for the spacer block could be super helpful.

[jasmussen]

I think this issue might be a duplicate of one @shaunandrews created for the same issue. I can't find it, but perhaps Shaun can?

[shaunandrews]

#16617

There's a bunch of related issues with regards to floating UI elements obscuring or otherwise making it difficult to interact with other UI elements.

[karmatosed]

Closing out to focus on that issue, thanks.