PM updates, still need Battery to show up on periph screen and calibration/recalib stuff to work, but it should tomorrow

lib/BlindMasterScreens/addingDevices/device_setup.dart

@@ -233,7 +233,7 @@ class _DeviceSetupState extends State<DeviceSetup> {
     bool ent = isEnterprise(network);
     bool open = isOpen(network);
     
-    Map<String, String> creds = await showDialog(
+    Map<String, String>? creds = await showDialog(
       context: context, 
       builder: (dialogContext) {
         return StatefulBuilder(
@@ -309,6 +309,7 @@ class _DeviceSetupState extends State<DeviceSetup> {
       }
     );
 
+    if (creds == null) return;
     if (creds["password"] == null && !open) return;
     if (creds["uname"] == null && ent) return;
     await transmitWiFiDetails(network["ssid"], network["auth"], creds);