Add presets to gradient editor, ux improvements https://files.facepunch.com/solw/2025/January/10_14-37-SolidUintagroundsquirrel.png Prevent gradient editor colour points having alpha value Support photoshop-style sampling of gradient color under cursor https://files.facepunch.com/solw/2025/January/10_15-21-RemorsefulAsianlion.png Fix being able to create new gradient point with a negative location Add context menu to GradientControlWidget