Incorrect scale bar when capturing images

[danimrich]

Steps to reproduce:

• Start a slow scan, e.g. using uSim and HAADF, pixeltime 16µs, resolution 1024px, FOV 100nm
• Click "Capture", wait for capture to finish
• Click "Capture", change FOV or resolution while the image is being captured
• Compare the two images.

Expected behavior: The two images should have the same scale bar as the first image.

Observed behavior: The scale bar for the second image reflects the new settings and is incorrect for the captured image.

Software versions: Nion Swift 0.16.4 installed via conda nionswift-usim 0.4.3 nionwift-instrumentation 0.20.7 Python 3.8.12

[TomaSusi]

I can also confirm this bug.