Allows PerforceSourceControl plugin to be built without the P4API libraries (will not function of course).
Perforce plugin build switched off for VS2015 until we can get libs in place.
[CL 2652386 by Jeff Campeau in Main branch]
UE-17117 - The Perforce SCC allows you to add files that don't exist
This also allows us to remove the ShouldForceBinaryAdd function, as that was to fix bad behavior when Perforce was addding an asset file that didn't yet exist.
ReviewedBy Thomas.Sarkanen
[CL 2634101 by Jamie Dale in Main branch]
#jira UE-6304 - Source Control: Add the ability to commit file deletions from the editor
#reviewedby Thomas.Sarkanen
[CL 2446774 by Richard TalbotWatkin in Main branch]
API break: added new pure virtual ISourceControlProvider::UsesChangelists()
API break: added new pure virtual ISourceControlState::FindHistoryRevision(const FString&)
API break: added new pure virtual ISourceControlRevision::GetRevision()
Implementing a Git provider requires us to be able to display revisions that are not indices as Git revisions are hashes. This updates the relvant code to allow us to display these revisions correctly.
[CL 2411986 by Thomas Sarkanen in Main branch]
* Multicast delegate Add* calls now return FDelegateHandles, and Remove* calls are now all deprecated, except for a new Remove function which takes a FDelegateHandle.
* New FConsoleManager::RegisterConsoleVariableSink_Handle and UnregisterConsoleVariableSink_Handle functions which work in terms of FConsoleVariableSinkHandle.
* Timer calls which don't take FTimerHandles are deprecated.
* FTicker::AddTicker now returns an FDelegateHandle and is removed by an overloaded Remove function.
* DEFINE_ONLINE_DELEGATE* macros now define _Handle variants of the Add/Remove functions which return/take handles.
* Various other handle-based registration changes.
* Some unity build fixes.
* Some simplification of delegate code.
* Fixes for lots of existing code to use handle-based registration and unregistration.
#codereview robert.manuszewski
[CL 2400883 by Steve Robb 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]
* 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]
API-breaking change (although I dont think that any other 3rd-party provider plugins are using it at the moment).
Kept old single-filename call & added new version that takes array of files. Re-implemented this for internal source control providers (just a patch on the old version).
Added automation tests for label syncing.
TTP# 340899 - SourceControl: Need Sync() overloads that accept multiple files
[CL 2190291 by Thomas Sarkanen in Main branch]
