Standardize plotting and improve plot customization

[timeverettadams]

Desired Behavior

• Standardize plotting functions across dkpy in terms of the customization options to provide a common interface for plotting and modifying plot settings. These include the functions
  • dkpy.plot_mu,
  • dkpy.plot_D,
  • dkpy.plot_magnitude_response_uncertain_model_set,
  • dkpy.plot_phase_response_uncertain_model_set,
  • dkpy.plot_singular_value_response_uncertain_model_set,
  • dkpy.plot_singular_value_response_residual,
  • dkpy.plot_singular_value_response_residual_comparison,
  • dkpy.plot_magnitude_response_uncertainty_weight.
• Improve ease of plot setting customization.
• Allow dkpy.DkIterInteractiveOrder to customize the plot settings of the dkpy.plot_mu interactive plots.