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]
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 334818 - Editor: Source Control: Revert files dialog checkboxes not behaving properly
#branch UE4
#proj Editor.SourceControlWindows
#change Changed the behaviour of the revert window as follows:
Previously:
Clicking revert unchanged only attempted to disable the changed files, all disabling did at this point was to make it seem as if the item was not selected even if it was. This meant that this check box did not fulfil its actual description
Now:
Checking revert unchanged only disables all of the file items as well as the checkbox to enable or disable all of the file items. It then enables the revert button and if pressed it will only send the unchanged files for reversion, this means it fulfills the buttons description.
#change Misc changes: Updated the buttons to use the standardized button layout, and changed "revert files" button to "revert" as this lead to a nicer layout. Added icons to show which of the selected files have been modified.
#reviewedby Thomas.Sarkanen
[CL 2093142 by Barnabas McManners in Main branch]
