Co-authored-by: Cwood <Cwood@DoVirt.org>

The ColorPicker auotmatically sets the LED to the selected Color
whenever the Input Settings are opened. Therefore it now checks if the
setting is turned off before changing the color.

misc: chore: Use explicit types in NVDEC projects (except VP9 because there's an open PR and I don't want to cause conflicts)

update gommon & use the Event class from it to allow easily clearing all handlers when the apphost exits to avoid leftover invalid event handlers in the rainbow event handler list.
More robust config application logic to ensure what needs to happen only happens once

Also check if its even enabled before setting the rainbow color
Fixes strobing

This allows the user to change the controller LED while using Ryujinx.
Useful for PS4 and PS5 controllers as an example.

You can also use a spectrum-cycling Rainbow color option, or turn the LED off for DualSense controllers.

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Co-authored-by: Evan Husted <greem@greemdev.net>

Inspired by the breakages covered in #409

Also moved IgnoreApplet to the System config section object.

Not functional yet. This is the UI & persistence side of #572.

fixes #565

The result of these extensions is an empty Optional when the user hits Cancel on the shown file picker.