Sort property values by `start time` (P580) if present

[μKöff]

Currently property values are displayed in the order they have been added to Wikidata. I'd like to propose to sort them by their start time (P580), if present, to have them in chronological order. If no start time is defined, the value could either be kept at its current position or moved to the very end of the list.

[μKöff]

Feature was already present. Guess it didn't work since there were end times.