Fix warnings when ShallowCopying vtkCaptionActor2D
ShallowCopying a vtkCaptionActor2D now explicitly checks if a leader-glyph connection is present before copying it to prevent warnings being emitted unnecessarily.
Backport: release
ShallowCopying a vtkCaptionActor2D now explicitly checks if a leader-glyph connection is present before copying it to prevent warnings being emitted unnecessarily.
Backport: release