I'd like to request that the border value actually work with 0 instead of using 'color+4'. This would allow any modder to use borderless progress bar as well as completely disable the feature without leaving an empty rectangle. You can achieve a borderless progress bar if you use these values as it exploits the overflow of the Uint8 parameter, but it's the only way to currently achieve this, probably unintended and still doesn't allow fully 'turning off' said feature.
interfaces:
- type: battlescape
elements:
- id: thinkingProgressBar
color: 252
color2: 0
border: 0