Add White to the Canvas color list

[Ivan Zajats]

Experienced users know how to change the Canvas color (with the right click).

Always wondered, why don't we have White in the list? Yep, we can choose it as a Custom color.

But it must be in the list by default as a basic color, IMHO.

If we need to check our document on another color, we'll have to make extra clicks after that to bring back White again. It's a waste of time.