Dropdown menu IDs shouldn't be based on content

Hi,

I've looked into the issue described and have made the following changes:

1- Updated prototype_prepare_menu_items Function: Modified the function to add a data-plugin-id attribute for each menu item based on the menu link's plugin ID.

2- JavaScript Updates: Changed the way IDs are retrieved in the JavaScript. Instead of transforming the text of the menu item, we now read the data-plugin-id attribute.

3- Typo Fix: Corrected the typo in the JavaScript where "pannel" was misspelled. It's now correctly spelled as "panel".

I've attached the patch that includes these changes. I'd appreciate any feedback or testing on this. Please let me know if there are additional adjustments needed!

Thanks for catching this and creating a patch, I've opened a MR that will be included in the next tagged release.