[FEATURE] Save color scheme so the new instance can use it as default

[yokemura]

Is your feature request related to a problem? Please describe. The color scheme should be consistent once you set it by your intension. The current version always chooses the color scheme of value 0 ("YMCK" color) as default.

Describe the solution you'd like Save the color scheme selection to a shared storage which can be accessed across any plugin instances, and when a instance is launched without saved settings use that value as default.

[sjfricke]

in Reaper you can save the preset as "default" and I can just change the color and then make that my default

Since colorScheme is using a juce::AudioProcessorParameter I would imagine other DAW's would work the same way