CMYK processing can't be stopped

[led]

Describe the bug Once the 'Start' button is pressed to process an image in CMYK mode, the 'Stop' button appears to have no effect.

To Reproduce Steps to reproduce the behavior:

1. Setup and image
2. Set 'Colour Separation' to 'CMYK'
3. Click 'Start' button
4. Click 'Stop' button.

Expected behavior Expected to be able abort the processing as with the other Colour Separation modes.

DrawingBotV3 Version 1.4.0 Premium

Operating System Mac Intel

[SonarSonic]

Fixed in dev