To allow for further abstraction & extension using DVCS systems like Git & Mercurial, we expose a new CanCheckIn() function that is used when determing 'modifed' files to check in.
#github https://github.com/EpicGames/UnrealEngine/pull/151
TTP# 335099 - [GitHub] 151 : Add ISourceControlState::CanCheckIn()
reviewed by Max.Preussner
[CL 2073950 by Thomas Sarkanen in Main branch]
#ttp 331118 LIVE: Editor: Source Control: Engine content is displayed in Check In dialog
#add Added a CanAdd() function to the source control state API & implemented this for both providers.
#change Changed asset context menu to restrict operations that can be performed based on the new information provided by CanAdd().
#fix Fixed a terrible bug in the SVN provider where only the first batch of 50 files would have their status returned correctly.
reviewed by Andrew.Brown
[CL 2043041 by Thomas Sarkanen in Main branch]