Have unlocked icon instead of lock disappearing

[SmarterHomeLife]

Firstly, thank you very much for your continued work on this card! Mine and many other dashboards would not be possible without it.

I use the lock feature a lot in my dashboards and in some cases it would be great to show an unlocked icon instead of the lock just disappearing when unlocked, something like the mdi:lock-open-variant-outline, and also being able to set a state color on that icon.