Most of the UI is great but the Biomes/Blocks/Tags menu's scrollbar resets when setting a new color or changing the search parameters. Both of these make the menu impractical to use when changing large amounts of custom colors, as it forces the user to scroll through the already customized options.

Fix suggestion: Just make it not do that :) The scrollbar should keep its relative position in the list even when the list changes. Only exception is that the scrollbar should snap to the end of the list if it gets shorter than the scrollbar is displaying.

Oh also, a few UX suggestions:

• the little "+" copy color button on the left of the options becomes invisible when an option has a custom color, although it is still clickable. It's possible that the intention was for the button to not work but its better if it stays there, it is very useful for quickly trying out many possible colors.
• Options on the list with custom colors are sorted in the order they were set in. This order should be customizable, either using buttons to shift then up/down, or drag-and-drop

Hi, thanks for this. You can also apply multiple blocks to one color at once using the little add button, and are you saying you want to keep that on the customized items, so if you wanted to change the color of many already customized items at once?
Also, where do you mean by options on the list? Which list should have a customizable order?