LPS-37979 Fix duplicated IDs in asset categories admin

***Cause***
- When `Add Vocabulary / Add Category` buttons are clicked, an instance of the category panel is created 

- That instance will only be hid when the panel is closed without reloading the page.

***Solution***
- Use `destroyOnHide: true` to destroy the panel instance whenever it is closed

- Instead of just re-showing the instance, a brand new instance is created