Create cancel button to cancel with exporting by Qt Bridge for Photoshop.

Exporting Qt Bridge for PSD took 55 minutes.
If we accidentally push the export button, we want a button that cancels the export so that we can immediately revert to the previous state.

The environments is as follow:
OS: Windows 10 Pro 64bit
CPU: Intel Core i7-8700k 3.7GHz
RAM: 32GB

PSD file size: 769.600KB
PSD image size: 1920 x 720
PSD number of layers:
toatl: 648
group1: 7
group2: 153
group3: 40
group4: 343
group5: 76
group6: 29