Update PSD plot in gui _viz_manager so that min/max frequency are set…

… according to the plot config rather than being hard coded (#914)

hnn_core/gui/_viz_manager.py

@@ -252,8 +252,10 @@ def _update_ax(fig, ax, single_simulation, sim_name, plot_type, plot_config):
 
     elif plot_type == 'PSD':
         if len(dpls_copied) > 0:
+            min_f = plot_config['min_spectral_frequency']
+            max_f = plot_config['max_spectral_frequency']
             color = ax._get_lines.get_next_color()
-            dpls_copied[0].plot_psd(fmin=0, fmax=50, ax=ax, color=color,
+            dpls_copied[0].plot_psd(fmin=min_f, fmax=max_f, ax=ax, color=color,
                                     label=sim_name, show=False)
 
     elif plot_type == 'spectrogram':