[5.4] Fix: Parent menu items missing when creating menu item via 'save to menu'

[hiteshm0]

Pull Request for Issue #46472

Summary of Changes

When creating a menu item via "save to menu" from articles or categories, the menu type is preselected on page load. But, the parent item dropdown does not have any items. This is because the parent item dropdown is populated only when a change event is fired on a menu type field. And no change event occurs when the page is loaded with a preselected menu item.

Fix: Added initialization logic to check if a menu type is already selected on page load. If yes, then the onChange function is trigerred manually.

Testing Instructions

1. Go to content → articles/categories
2. Open/create any article/category
3. Click save to menu button
4. Check the parent item dropdown

Actual result BEFORE applying this Pull Request

Parent Item dropdown is empty

Expected result AFTER applying this Pull Request

Parent item dropdown has the correct items

Link to documentations

Please select:

• Documentation link for docs.joomla.org:

• No documentation changes for docs.joomla.org needed

• Pull Request link for manual.joomla.org:

• No documentation changes for manual.joomla.org needed

[ceford]

I have tested this item ✅ successfully on 9e64196

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[coolcat-creations]

I have tested this item ✅ successfully on 8110997

Works as described and is very useful, thank you!

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[richard67]

RTC

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