Control Panel: Move postfilter into its own group

pythermostat/pythermostat/gui/view/ctrl_panel.py

@@ -244,9 +244,9 @@ class CtrlPanel(QObject):
         for postfilter_params in postfilter_data:
             channel = postfilter_params["channel"]
             with QSignalBlocker(self.params[channel]):
-                self.params[channel].child(
-                    "Thermistor Config", "Postfilter Rate"
-                ).setValue(postfilter_params["rate"])
+                self.params[channel].child("ADC Config", "Postfilter Rate").setValue(
+                    postfilter_params["rate"]
+                )
 
     def update_pid_autotune(self, ch, state):
         match state:

pythermostat/pythermostat/gui/view/param_tree.json

@@ -181,7 +181,13 @@
                   "field": "b"
                },
                "lock": false
-            },
+            }
+         ]
+      },
+      {
+         "name": "ADC Config",
+         "type": "group",
+         "children": [
             {
                "name": "Postfilter Rate",
                "type": "list",