Simplify/fix FText name generation for modifier keys
Have FInputGesture store a bit mask and expose helper functions instead of public boolean parameters (required to switch meaning of command/control on Mac)
#codereview Michael.Trepka
[CL 2365131 by Marc Audy 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]
- removed dummy UClasses (no longer needed)
- removed file header comments (not used)
- removed duplicated function documentation in cpp files
- documentation cleanup, punctuation, spelling etc.
- pragma once include guards (now work on all platforms)
- relative public includes (are auto-discovered by UBT)
- fixed too many/too few line breaks
- deleted empty files
- missing override
- NULL to nullptr
[CL 2305058 by Max Preussner in Main branch]
#ttp 335130 - EDITOR: Keyboard Shortcuts: Toast falsely warns of failed import if prompted for save
#branch UE4
#proj Editor.EditorSettingsViewer, Editor.InputBindingsEditor, Editor.UnrealEd, Developer.SettingsEditor
#add Added FEditorSettingsViewerModule::HandleInputBindingsSave as a SaveDelegate for the keyboard bindings section, whose purpose is just to remove user gestures so nothing is flushed to config at editor shutdown, and hence does not supersede the freshly copied imported config.
#change Changed the message in FEditorSettingsViewerModule::ShowRestartWarning to inform the user that changes will not take place until after restart.
#change Fixed input binding editor behavior so that valid gestures are committed immediately instead of requiring a change of focus.
#reviewedby Max.Preussner
[CL 2079970 by Richard TalbotWatkin in Main branch]
