Gradient tool

[GlobbyLikesSlime]

Tool type: Paint / Voxel
Tool name: Gradient
Tool icon: A rectangle with a gradient

Tool short description:
Create a rectangle that starts at the left color and fades to the right color.

Tool action on Left click:
what the tool would do when user click with left button.
It creates a rectangle with a gradient going from the left to the right color.

Tool action on Right click:
what the tool would do when user click with right button.
It creates a rectangle with a gradient going from the right to the left color.

[Sphax]

Thanks for your well formatted suggestion

Gradients would be easy to add for painting on textures but a real challenge for voxels... I'll see what i can do.