Fixed incorrect rendering of 3D-floors, masked and transparent surfaces introduced in 1.05...
Additive transparent surfaces aren't affected by dynamic lights now (because they aren't affected in GZDoom).
Added Color Picker plugin
Point, Flicker and Pulse light animation should now look almost exactly as seen in GZDoom.
Fixed a bug when editing thing properties in Visual mode didn't update visual thing.
Fixed incorrect doom-style walls shading when sector has "lightcolor" property set.
Fixed "Index was outside the bounds of the array in CalculateNormalsAndShading()" error.
GZDoomBuilder will now show error message prior to failing.