Option to disable session background colors in file explorer

I choosed custom colors for coloring just "monitor" icons of the sessions, but not the background colors in the interface. Is there any option to disable custom background colors, while having it in icons? I prefer to have white backgrounds.

I've made a screenshoot to illustrate the idea. Thanks for the great program!

Thanks for your suggestion.

This issue has been added to the tracker:
https://winscp.net/tracker/1109