P: Transform redraw issue with scrubby zoom

@Mark.Dahm @J453  more than 4 years later, this bug is still around. Tested with v25.7, MBP M1, OS 14.4.1

We're investigating. The GPU draw commands come intermittently from our controls (like transform and crop), so it looks like it could be a problem up the stack from the GPU into the tool code. Looking into it.

Thank you, @J453 I've been trying to get this fixed for years now, as well as the jumping crop scrubby issue that's been around for just as long.

@J453 This is still bugged and has been for at least 5 years.

Repro:

- select layer and cmd-t

- transform in some way (don't commit)

- cmd-spc to activate scrubby

- zoom in

result: layer totally disappears until mouse release, then after release the image will first render the pre-transformed state before redrawing the transform. If you then add another transform (without committing the first) Ps will often redraw both transforms before rendering the intended transform. 

Screencap:

https://www.loom.com/share/70f2be5fc66f4b83ac171b8be7de63ea

Fixed 21.2.3 or later.