Increase the number of custom user color palettes available #4933
Description
As a user, I would like to have more than 10 custom user color palettes available so that I can store more palettes.
I love how versatile this feature is for creating pleasing ambient lighting effects. I have created a number of presets so I can change my lighting based on my mood, the weather, the season etc, but of course having a limit of 10 means I run out quite quickly.
Discussion at https://wled.discourse.group/t/more-than-10-custom-user-color-palettes/14833
PR at #4932