Feature request: header in popup should also function as a slider

[jorisvanr]

Hi! I'm experimenting with the popup card and I think it is exactly what I was missing. I currently show a slider when my lights are on and hide it again when the lights turn off. This would however be redundant if the header (see attached image) would also function as a slider itself.

I might be missing something since this is how it works when the button type is set to a slider. Having a similar option in the popup would be huge so I can get rid of another feature 🎉

ps. I'm also noticing font size issues in these screenshots but I'm not sure if that is a conflict on my end. Did not look into that yet.