TTP# 334923 - EDITOR: Perforce Integration (Move -> Delete + Add instead of Integrate)
New API: Added ISourceControlRevision::GetBranchSource.
Made sure the P4 and SVN providers perform integrates/copies so that history is maintained across file copies & moves.
Also fixed SCC icons not refreshing sometimes until source control operation has completed.
Added new branch icon.
Fixed date display in history.
This required some fairly nasty fixup to get it all working within the Editor copy code path, but the majority of the changes are in the source control providers.
reviewed by Andrew.Brown
[CL 2095604 by Thomas Sarkanen in Main branch]
#ttp 331349 Editor: Source Control: Request for ability to sync directories in the Editor
#add Added new menu option to sync a directory from the path/asset view.
#change Changed P4 sync command to append '...' to directory arguments, so subdirectories are also processed.
#fix Fixed Subversion file status being incorrectly reported on Editor startup for statuses that require server access (lock, sync etc.).
#change Changed PackageTools::UnloadPackages to return an error message. This avoid multiple popup messages. Also fixed issue where an unload could fial to unload a package (because it wasnt loaded in the first place) and then fail to sync because of it.
reviewed by Andrew.Brown
[CL 2046626 by Thomas Sarkanen in Main branch]
