UETOOL-213 - Minimize Slate FString -> FText conversion (remove SLATE_TEXT_ATTRIBUTE)
This fixes any editor/engine specific code that was passing text to Slate as FString rather than FText.
[CL 2399803 by Jamie Dale in Main branch]
This is a subset of changes (compiler warning fixes needed to compile Linux editor) from pull request 185 by sbc100, 3dluvr, wshearn, abarbu et al: https://github.com/EpicGames/UnrealEngine/pull/185
- Initialization order fixes
- Missing virtual destructors in classes with virtual funcs.
- Missing newlines at the end of file
#codereview Robert.Manuszewski
[CL 2085576 by Dmitry Rekman in Main branch]