Export Texture with Opacity causes colors to be mixed up

[MickCrozier]

ArmorPaint version: 0.9

OS/device including version: MacOS 13.0.1

Issue description: Exporting base with opacity causes colors to be be incorrect

Steps to reproduce: Create a texture with opacity, and various colors across the rainbow. Export Texture, 'base_color' preset. Select Presets Tab. Change 'A' to 'opac'. Select Export textures tab. [Export]

The saved .png will have incorrect coloring - It looks like the RGB is mixed up, I've tried swapping around RGB in the export but haven't found a working example.