[GUI] Order detail view: Colour-code available and missing input products

[tangobravo62]

In a lengthy list of input products for a job step it can be cumbersome to pinpoint the missing product(s), which keep it in state WAITING_INPUT. Therefore a colour code shall be applied to the product links to show, which ones were already resolved successfully, and which ones are still missing.

[emelchinger]

Implemented and mouse over help added.