Issue Summary

Currently, in Trello's Map view, the colour of a location pin is automatically determined by:

1. Setting a card cover image or colour on the card
2. If no card cover image or colour is set, the map pin will default to the colour of the first label added to the card

Users who utilise card covers for visual context on their cards find that the Map view pins become less useful because the pin colour is forced to match the cover image. 

Suggestion:

Provide an option to manually select a pin colour in the Map view, or allow users to choose whether the pin colour should be derived from the card cover or labels, regardless of whether a cover image is present.