brooke hubert 19b9b7475d Add accessor for last undo barrier in the stack for code to query against. ...

# Added ability for the undo history window to add or remove undo barriers when not in PIE to facilitate testing the feature
# Fixed an issue where clearing the undo stack would result in the barriers remaining and preventing subsequent undo

#preflight 6362b7890c2e7c8f91aa7ccb
#rb [at]francis.hurteau

[CL 22937867 by brooke hubert in ue5-main branch]

2022-11-02 23:05:53 -04:00

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Private

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Public

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UndoHistoryEditor.Build.cs

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