[Feature Request] Container Colors

[tradewatcher]

An option @settings to enable a small colorized line in color of each container would be great.
The small vertical line is best placed at left side of favicon.

[desrod]

I would add that it would be better to have the container tab's custom icon to the left of the favicon on each sidebar tab, along with a border colorizing the tab with the container's specified color, for quick visibility and grouping.