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The EditorClientWx::registerCommandForUndo and registerCommandForRedo methods are unimplemented, so the wx port lacks undo and redo support.
Created an attachment (id=25353) [details]
Implements undo/redo in the wx port
Implements and EditCommandWx stack, and exposes an Undo/Redo API in wxWebView.
Landed in r38687, thanks!