The Listbox drawer icon in ZUL Palette is not correct.

Please see the attached image for reference.

Steps to Reproduce

1. Install ZK Studio
2. Create a new ZK Project or ZUl file
3. Use the ZUL Palette, Expand the Listbox drawer

Current Result

The icon of Listbox drawer is "Element".

Expected Result

The icon of Listbox drawer is the same as "listbox".