Bugfix: Have BodePlot create new subplots as per spec when appropriate
BodePlot should respect fig and spspec if it exists on initialization but create new subplots according to spspec as needed fig is provided but the given spspec slots do not.
BodePlot should respect fig and spspec if it exists on initialization but create new subplots according to spspec as needed fig is provided but the given spspec slots do not.