* See SlateStats.h for details on the new system, which allows for full hierarchical profiling with limited overhead.
* Moved SWidget::GetVisibility() out of line so we can instrument it without a full recompile.
* Widget debug info now uses FName to store the line number of the file. Keeps it in one place and the new stats system can utilize it as an FName.
* Exposed SWidget CreatedInFile debug info as an FName so new stats system can use it.
* FSlateVertex no longer uses FVector4, which is an aligned struct. Switched to float[4] instead. Goes from 48 to 36 bytes.
#codereview:nick.atamas,matt.kuhlenschmidt
[CL 2417281 by Wes Hunt in Main branch]
Made sure to manually load the appropriate modules for source code access.
The hot reload dependency that VisualStudioSourceCodeAccess had was bringing in the whole editor as a dependency, so this is now restricted to editor builds.
SlateViewer now compiles in CoreUObject as the source code accessor module requires it for its settings.
TTP# 333675 - CHECKIN: SLATE: WidgetReflector code reference hyperlinks don't work anymore
#codereview Nick.Atamas,Frank.Fella
[CL 2292278 by Thomas Sarkanen in Main branch]
