add dispose to files to remove controllers when not used

Frontend/patient_manager/lib/pages/profileBusinessAdd.dart

@@ -197,6 +197,23 @@ class _ProfileBusinessAddState extends State<ProfileBusinessAdd> {
     return regex.hasMatch(text);
   }
 
+  @override
+  void dispose() {
+    nameController.dispose();
+    typeController.dispose();
+    regController.dispose();
+    logonameController.dispose();
+    fnameController.dispose();
+    lnameController.dispose();
+    titleController.dispose();
+    signtureController.dispose();
+    accessController.dispose();
+    contactController.dispose();
+    emailController.dispose();
+    _focusNode.dispose();
+    super.dispose();
+  }
+
   @override
   void initState() {
     setState(() {