Werk #12918: ups_capacity: add missing perfometer

The perfometer that was present in version 1.6 was missing in version 2.0. The perfometer is now available again and changed to display the reamaining time instead of the percentage. This seems to be more useful as the remaining percentage may vary a lot. 100% may e.g. represent 1 or 100 minutes. This way it is now possible to order the services by the remaining time. Furthermore, the colors of the metrics are adapted to improve readability.

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