Newly installed versions of the engine will now attempt to copy the project-agnostic config settings from a previous engine installation. This happens by way of a versioned manifest that copies old versions when the manifest does not exist, or is a different version. This code path is benign for non-installed versions of the engine (or FPaths::ShouldSaveToUserDir() is false).
EditorGameAgnosticSettings and EditorUserSettings ini paths have been renamed to EditorSettings and EditorPerProjectUserSettings respectively to better convey their purpose. In general, most settings should be saved in EditorSettings (project-agnostic) so that they apply regardless of which project is open. We have some way to go migrating existing settings for this to be the case, however.
Some previously per-project configuration files are now project-agnostic (such as Editor.ini, EditorKeyBindings.ini, and EditorLayout.ini)
GEditor->Access...Settings and GEditor->Get...Settings have been removed in favor of direct access of the CDO through GetMutableDefault<> and GetDefault<> respectively. Global config ini filenames that are not set up are now neither loaded nor saved on build machines, to handle the problem of indeterminate state more generically.
This addresses UETOOL-270 (Most editor preferences should be project-agnostic)
[CL 2517558 by Andrew Rodham 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]
#branch UE4
#proj Editor.LevelEditor
#summary Added 1x1 viewport layout and tidied the margins in the layout menu
#add Added FLevelViewportLayout::bIsMaximizeSupported and public getter IsMaximizeSupported(). This is set on the new one-pane layout to block the maximize command/button.
#add LevelViewportConfigurationNames::OnePane - new named layout config.
#add FLevelViewportCommands::ViewportConfig_OnePane - new layout command.
#change FLevelViewportLayout::InitCommonLayoutFromString() - will never start a layout maximised if bIsMaximizeSupported is false.
#change FLevelViewportLayout::SaveCommonLayoutString() - will never save a layout maximised if bIsMaximizeSupported is false.
#change FLevelViewportLayout::MaximizeViewport() - checks that bIsMaximizeSupported is true as it should never be called on a layout that doesn't support it.
#add SlateEditorStyle - added brushes for one pane option in the viewport layout menu.
#add SLevelViewportToolBar::GenerateViewportConfigsMenu() - new section for one pane layouts with the one pane button in it.
#change SLevelViewportToolBar::GenerateViewportConfigsMenu() - fixed the layout margins by setting the label visibility to collapsed instead of passing an empty string as the label.
#add Binding new ViewportConfig_OnePane command SLevelViewport::BindViewCommands to OnSetViewportConfiguration().
#change SLevelViewport::GetMaximizeToggleVisibility() & OnToggleMaximize - check IsMaximizeSupported() on the parent layout and always collapses the maximize button when it isn't supported.
#add FLevelViewportTabContent::ConstructViewportLayoutByTypeName() - added LevelViewportConfigurationNames::OnePane.
#add New icon image for one pane button in the menu - ViewportLayout_OnePane.png
#add New layout class FLevelViewportLayoutOnePane - based on other layouts but simpler because it only contains one pane and therefore no splitters.
reviewedby Thomas.Sarkanen, Max.Preussner
[CL 2048729 by Chris Wood in Main branch]
