probe capture fixes

review of per and post bake protocols showed that the CAPTURING shader macro was not being properly recompiled in. as opengl was not playing nice with a simple batch shader recompilation for all effected shaders, a full lightmanager restart is at time of writing required. once we have a proper globally cached scene structure stored off GPU side, we'll want to change  GFXShader::addGlobalMacro("CAPTURING", String("1")); on over to dirtying that value in the cached buffer via setting a shader global uniform
review of prefilter examples shows a fixed sample count of 1024 across multiple implementations, so we'll use the standard barring further research into where that number is comming from for a scalar approach
review of gl shaders shows a doubleup in compiled state testing, so slimmed that down and added additional debugging reports

Engine/source/renderInstance/renderProbeMgr.h

@@ -357,6 +357,7 @@ public:
    /// </summary>
    static bool smRenderReflectionProbes;
 
+   static bool smBakeReflectionProbes;
    //=============================================================================
    // Utility functions for processing and setting up the probes for rendering
    //=============================================================================