fix: remove focus from myinfo child field when form is opened (#6729)

* fix: use update instead of append

* fix: use shouldFocus option for append

* fix: remove initialIsOpen for childname dropdown

frontend/src/templates/Field/ChildrenCompound/ChildrenCompoundField.tsx

@@ -94,7 +94,7 @@ export const ChildrenCompoundField = ({
   // Initialize with a single child section
   useEffect(() => {
     if (!fields || !fields.length) {
-      append([''])
+      append([''], { shouldFocus: false })
     }
   }, [fields, append])
 
@@ -295,7 +295,6 @@ const ChildrenBody = ({
               items={[childName, ...namesNotSelected()].filter((e) => e !== '')}
               value={childName}
               isDisabled={isSubmitting}
-              initialIsOpen={!!myInfoChildrenBirthRecords?.childname}
               onChange={(name) => {
                 // This is bad practice but we have no choice because our
                 // custom Select doesn't forward the event.