Added feature of changing the color temperature of the screen

[Andoramb]

Feature Addition

Description

Hi, I have added a slider for changing the color temperature of the display.
It acts the same way changing the brightness:

• an overlay is created, that changes it's opacity and warm-cold tints
• there is a reset button, that reverts any color temp change
• a TEMP notification can be called to change it from notification
• this feature works well with node-red (I am changing the color temp based on hour/daylight/other light sources Home Assistant🙂

Changelog

Couple files were modified when adding this, but essentially it's a copy from the brightness slider.
Additionally some css code was modified to fit the temp slider

Requirements

Try to test it, it works for me locally

Additional info

Let me know what do you think of it 🙂