FPlasticSourceControlState::CanCheckout() now let the user try to che…

…ckout even if an asset is already checked-out elsewhere

As with multiple destination branches it is possible to have as many locks on the same asset as destination branches.

Note: Ideally we would want to check explicitly if the other lock is "on the same destination branch" as the current branch,
but that's overly complex and not possible currently with cm.

Source/PlasticSourceControl/Private/PlasticSourceControlState.cpp

@@ -580,7 +580,7 @@ bool FPlasticSourceControlState::CanCheckout() const
 
 	const bool bCanCheckout  =    (WorkspaceState == EWorkspaceState::Controlled	// In source control, Unmodified
 								|| WorkspaceState == EWorkspaceState::Changed)		// In source control, but not checked-out
-								&& !IsCheckedOutOther()	// Is not already checked-out elsewhere
+							//	&& !IsCheckedOutOther()	// Note: with multi-destination branches it is sometimes possible to checkout an asset already checked-out elsewhere. Let the user try.
 								&& IsCurrent();			// Is up to date (at the revision of the repo)
 
 	if (!IsUnknown())