Switch to switch off timer ticking LED

[vanseforge]

A switch to switch off the timer ticking LED (request #418).
I think that was a good idea and I also find the reasoning logical. As in the example with a short sleep, there are cases where you don't want the LEDs to light up on the timer.
I have hidden and deactivated the switch by default, as it is probably not used by everyone and therefore the configuration remains clearer.

[runarbjorn]

Thanks for adding the timer-LED switch. Would you be open to extending this to cover the white error flash and animation on Wi-Fi disconnect as well?

My suggestion: introduce a single “Sleep Mode” switch that, when enabled, skips the timer-ticking and the bright-white error and animations (falling back to turning the LEDs fully off). This keeps the UI simple (one toggle for “quiet night” mode) while preserving current behavior for users who don’t enable it.

The bright white light in the middle of the night when the router reboots is not very popular to some people in my house :)

[Lars-Integraleo]

Thank for adding the switch. I like to ask you for a led rin on/off switch when I add an alarm for a time. Like "Hey Jarvis" wake me up at 8 am. Then the led ring is animated the complete night.