This means the type information is available for all methods operating
with the setting type, which is easier for the authors, allows for
compile-time checks and optimizations.
Remove the enum that was used to indirectly obtain the setting type at
runtime.
Revises SGUISetting and enum from e326ebae46 (5122b0f906),
std::function from 82f1d2718b.
Differential Revision: https://code.wildfiregames.com/D2145
Tested on: gcc, clang, VS2015, Jenkins
This was SVN commit r22604.
Call JS_AddExtraGCRootsTracer and JS_RemoveExtraGCRootsTracer depending
on JS::Heap use instead of on CGUI page link setup.
GUIObjects should be able to access the GUI page independent of the
scripting (for example to obtain PredefinedColors, refs D2108).
Refs: D2108, c02a7e1a7b
Comments By: wraitii
This was SVN commit r22587.