New Features:
- [general] save scene and settings (brightnes, speed, bpm) over restarts
- [new scene] rotating colors
- rotating thru the colors of the color wheel
- rotation speed is settable between
1and20in the settings page
- [new scene] random color
- show random colors fastly
- and stop/start at clicking the tile again
- [new scene] local sports club
- [mqtt] make tempo of bpm scene settable
- [Dsiplay] sleep mode after 5min
- [Dsiplay] dim or send display to sleep via settings page