### AssetTools
Check each package's mount point and fold that against each Plugin's LoadedFrom (Project or Engine)
If Engine content is visible in the Content Browser, show but do not schedule Engine Plugin content for Migration
Add support for sending in "ShouldMigratePackage" state to SPackageReportDialog
### SPackageReportDialog
Remove "Active" state -> this dialog used to associate Disabled tree item state with the state of not Migrating a package. Just rely on the check state to dictate if a package will be Migrated
Add support for indeterminate checkbox state for folders within the dialog when some, but not all, children being selected for migration
Add logic for initial check/indeterminate/unchecked state and when check state changes on an item
Propagate check state up the hierarchy from the check change event item
#rnx
#rb rex.hill
#jira UE-142543
#preflight 620d6a3926435e00d2de7d3f
[CL 19023118 by geoff evans in ue5-main branch]
#rnx
#rb none
#ROBOMERGE-SOURCE: CL 10869240 via CL 10869516 via CL 10869902
#ROBOMERGE-BOT: (v613-10869866)
[CL 10870584 by ryan durand in Main branch]
FindWidgetWindow no longer returns a path and uses parent pointers to find the parent window safely and more efficently.
#rb chris.gagnon, nick.darnell
[CL 4680301 by Matt Kuhlenschmidt in Dev-Editor branch]
#lockdown Nick.Penwarden
#rb none
==========================
MAJOR FEATURES + CHANGES
==========================
Change 3209340 on 2016/11/23 by Ben.Marsh
Convert UE4 codebase to an "include what you use" model - where every header just includes the dependencies it needs, rather than every source file including large monolithic headers like Engine.h and UnrealEd.h.
Measured full rebuild times around 2x faster using XGE on Windows, and improvements of 25% or more for incremental builds and full rebuilds on most other platforms.
* Every header now includes everything it needs to compile.
* There's a CoreMinimal.h header that gets you a set of ubiquitous types from Core (eg. FString, FName, TArray, FVector, etc...). Most headers now include this first.
* There's a CoreTypes.h header that sets up primitive UE4 types and build macros (int32, PLATFORM_WIN64, etc...). All headers in Core include this first, as does CoreMinimal.h.
* Every .cpp file includes its matching .h file first.
* This helps validate that each header is including everything it needs to compile.
* No engine code includes a monolithic header such as Engine.h or UnrealEd.h any more.
* You will get a warning if you try to include one of these from the engine. They still exist for compatibility with game projects and do not produce warnings when included there.
* There have only been minor changes to our internal games down to accommodate these changes. The intent is for this to be as seamless as possible.
* No engine code explicitly includes a precompiled header any more.
* We still use PCHs, but they're force-included on the compiler command line by UnrealBuildTool instead. This lets us tune what they contain without breaking any existing include dependencies.
* PCHs are generated by a tool to get a statistical amount of coverage for the source files using it, and I've seeded the new shared PCHs to contain any header included by > 15% of source files.
Tool used to generate this transform is at Engine\Source\Programs\IncludeTool.
[CL 3209342 by Ben Marsh in Main branch]
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]
