Note: this setting is global, even though it appears in the settings for the individual gamepad. This is simply for consistency; you access all the rainbow stuff in one place.
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>
Quality of life feature
Similar in function to the "Start Games in Fullscreen" toggle
For users who want to run games in windowed/non-fullscreen mode with
menu UI hidden, this eliminates the need to always click "Hide UI"
