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Issues with Effects on LED Pixels with Internal Display Patterns (GS8206 and GS8208) #1203

@paulreichart

Description

@paulreichart

Is your feature request related to a problem? Please describe.
Some newer LED chips (GS8206/8208) have a feature where they will display their own patterns in the absence of a data signal. The timeout seems to be under 1 second. They will actually run their patterns with only a power supply connected.

This becomes an issue when turning off the "power" in WLED, which I'm assuming sets the strip to black and stops sending data. This then triggers the pixels to go into internal display pattern mode. Some effects which use a pause also cause this problem, most noticeable being the lightning and ICU effects.
The only workaround to be able to turn these pixels "off" in WLED is to set them to black.
Setting solid colors does not cause this problem.

Describe the solution you'd like
WLED would need to output a continuous data stream to keep these chips happy, even during pauses in effects.

Describe alternatives you've considered
Right now the only workaround with these pixels is to set them to black to turn them off,

Additional context
GS8206 datasheet: https://www.led-stuebchen.de/download/GS8206eng_v170627.pdf (bottom of page 7)

An example of these for sale: https://www.aliexpress.com/item/32916801032.html

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