Add feature to change color for all POI within a list at once

[gmxde]

I imported several lists of POI, each list with several hundred of POI (charging stations). Unfortunately all Pins of all list are shown in red color, so that Pins of different lists cannot be distinguished. Would it be possible to add a feature that allows to change the color of all POI within a list in a single step? Currently I have to change the color of each POI individually.