Use variable in visibility options

[jenseo]

Let me first just say, your improved version of the decluttering card is a godsend, this is exactly how I want to work with my dashboards.

Is your feature request related to a problem? Please describe.
It seems that the variables set in the decluttering template can't be used in the visibility options and I have to use a conditional card for that. Unfortunately, this rules out being able to use decluttering card, since a conditional card inside a decluttering template will still take up space, since the decluttering card is not hidden.

Describe the solution you'd like
If it would be possible to use the variables of decluttering card inside the visibility options, this would greatly improve things in my opinion. My use case for instance is to display a quick toggle for each room to turn of all lights in a room, but would only want to show the toggle for the room if there is a light on in that particular room. This to reduce the risk of accidentally turning on a light in a room where the kids are asleep for instance.

Describe alternatives you've considered
Conditional card, but it gives the problem I describe above and it would be awesome not having to duplicate a lot of conditional cards for every entity.