Disabled Size fields draggable in File > Export UI

[debraspicher]

There's not much to explain in the title. I included a video of the behavior:

https://1drv.ms/v/s!AuWHX0h5bAoRifpT7-MdjNs79ZejKQ?e=3pK7hu

[VectorStyler]

@debraspicher Looks like a bug, added it to the backlog.