Tile card: Make shaping optionally

[KNXBroker]

I love the new tile card, however not the (mushroom) shaping. For me the shaping makes the icon hard to read (blurry) and an eye-catcher (which I do not want to have), especially in dark themes. Furthermore clicking more-info does also not contain any shaping.

Can you make the shaping optionally? This would also give the possibility to be consistent with the old (existing) cards, more-info, etc.

Example with shaping active:

Example with shaping inactive:

[KNXBroker]

Another idea: making the opacity value a theme variable...