UiBox2 validation + standardisation

[metalgearsloth]

Standardises it with the other ones.

[kontakt]

Test fails are real - looks like we have some instances of incorrect usage already.

[metalgearsloth]

Test fails are real - looks like we have some instances of incorrect usage already.

death

[Tayrtahn]

Should be an easy enough fix:

RobustToolbox/Robust.Shared.Maths.Tests/Color_Test.cs

Line 124 in e164c94

UIBox2 notColor = new UIBox2(rf, gf, bf, af);

The assertion that actually uses that variable is commented out already, so:

RobustToolbox/Robust.Shared.Maths.Tests/Color_Test.cs

Line 138 in e164c94

// Assert.That(controlColor, Is.Not.EqualTo(notColor));