Adjust cmd_upFolder Icon in Browser view

[Kouhz]

Usually while browsing in a folder, there is right before the first thumbnail a 'Folder Up' function (cmd_upFolder) to navigate to the parent folder. My goal is to adjust the icon to be better fitting with my dark theme (another color & form instead of the default green one).

So, I know you can hide the button completely in the filter settings and you can customize the icon in the toolbar - but I wasn't able to find a way to adjust it in the main browser view right next to the thumbnails. Is this icon some kind of hard coded in XnView? Would kindly appreciate some details about that, otherwise I'll probably just waste time.

-Kouhz-

[Kouhz]

Nobody got some insight on the topic? If the icon in question is still unknown, I've linked it this time.