Adding persist - T2

Adding model persist so that the apply can be used for testing. Previous did not  persist as intented.

vite/src/pipedal/JackServerSettingsDialog.tsx

@@ -544,7 +544,7 @@ const JackServerSettingsDialog = withStyles(
                 // Apply immediately so the status display can confirm
                 // whether the selected devices are working.
                 s.valid = true;
-                this.model.setJackServerSettings(s);
+                this.model.applyJackServerSettings(s);
                 this.startStatusTimer();
             }
         };

vite/src/pipedal/PiPedalModel.tsx

@@ -2530,6 +2530,12 @@ export class PiPedalModel //implements PiPedalModel
                 this.showAlert(error);
             });
     }
+    applyJackServerSettings(jackServerSettings: JackServerSettings): void {
+        this.webSocket?.request<void>("applyJackServerSettings", jackServerSettings)
+            .catch((error) => {
+                this.showAlert(error);
+            });
+    }
 
     updateVst3State(pedalboard: Pedalboard) {
         // let it = pedalboard.itemsGenerator();