Fix colors when using mounted colors and auto colors

[artemipanchuk]

No description provided.

[Flunt1k]

As a suggestion: We already have a list of colors used (colorsConfig.mountedColors), it looks like we can avoid the first pass through the array and do the coloring in one pass through the graphs.
I suppose we could do something like Object.values(colorsConfig.mountedColors) and then add that to usedColors. After that, we can make a single pass through the graphs and color them