Dimension flags: As a program manager I want to hide a dimension from list filters or detail view

[japsu]

Related to #474

Once we implement freeform location, it won't make sense any more to show in the program detail view the location both as dimension bubble and freeform location.

Propose adding flags such as isListFilter (default true) and isShownInDetail (default true) so that special dimensions such as date and room may be hidden in specific contexts.

An alternative would be to base this on locationDimension, but that would be too magical.

Slack discussion