b1.7 - New triangle stuff and a few tweaks here and there

Changed the way triangles work, so now the smaller the triangle, the faster it goes, and the closer to the screen it is, to follow osu! guidelines.

Forced all triangles to be the same opacity, therefore removing the need for the "opacity min" slider

Updated shading on background so its the colour you set

Some other tweaks here and there, i forget