Inspector loads slowly when there's many Color properties

[larspet]

Tested versions

Reproducible in 4.4.dev7, and probably many versions earlier.

System information

Windows 11

Issue description

Inspectors (or project/editor settings) that contain many Color properties will load slowly. Additionally, they can be slow to switch away from.

Steps to reproduce

For example, check out:

Editor Settings > Text Editor > Theme     (the worst example)
Editor Settings > Editors > 3D Gizmos
Editor Settings > Editors > Visual Editors
Project Settings > Debug > Shapes

Minimal reproduction project (MRP)

Also, I made an MPR that has a Node with an exported Array[Color], and some extra Color properties. Try repeatedly switching between the Colorful and Colorless nodes (make sure the Array is expanded).

color_picker.zip