The display name, filter string, and tooltips for the property editor (and associated detail customizations) are now stored as FText rather than FString. This allows us to remove SLATE_TEXT_ARGUMENT from the detail customization widgets.
[CL 2372595 by Jamie Dale in Main branch]
* Moved Slate.h into SlateBasics.h and began shifting less commonly used headers into SlateExtras.h.
* Slate.h now simply includes SlateBasics.h and SlateExtras.h.
* Slate.h includes a deprecated warning now to indicate that SlateBasics.h + specific includes should be used instead.
* Moved dozens of inlined functions using Slate widgets into .cpp files to avoid header dependencies.
* All code samples now include SlateBasics.h and SlateExtras.h so future shifts will not break most those projects, but not trigger the deprecation warning of including Slate.h.
#BUN
[CL 2329610 by Wes Hunt in Main branch]
Made sure to call NotifyFinishedChangingProperties so that packages are dirtied when editing values.
Also increased precision in floating-point SetValue. We should not go via strings to do this, but we dont have any other way at the moment, so this is the next best thing.
TTP# 341202 - BLUEPRINT: A transforms default value does not get carried over from the set values in its structure
reviewed by Andrew.Brown
[CL 2228482 by Thomas Sarkanen in Main branch]
#ttp 339291 - Level Editor Details panel transform copy/paste not compatible with Blueprint Details panel transform
#branch UE4
#proj Editor.DetailCustomizations
#reviewedby Chris.Wood
[CL 2169038 by Richard TalbotWatkin in Main branch]
