* JSI_GUIColor::construct and JSI_IGUIObject::setProperty hunk are
duplicates of FromJSVal, getProperty of ToJSVal, following 7c2e9027c2.
* The constructor, it's fallback magenta and toString have never been
used by JS.
* A JS color class providing some methods (such as found in color.js,
refs #5387, and the unused toString redundant with rgbToGuiColor, see
also eee8217b45) is more inviting to changes and maintenance if defined
in JS and can still be instantiated in C++, like the Vector2D (see also
65b02395b3).
* PredefinedColors (such as "red" or "green") can be obtained from the
prototype without defining the class in C++.
* Minimize ugliness by removing macrosity, refs 8ceb41212d.
Rename alpha to a in guiToRgbColor from eee8217b45 for consistency with
the C++ conversions (opaqueness had been skipped in the only callers of
this JS function yet).
Delete unused GUISTDTYPE Mouse in header forgotton in 8734efca94.
This was SVN commit r22534.
9be8a560a9