### Bug report

The ExpandAll() option does not expand or collapse the TreeView nodes.

### Reproduction of the problem

1. Enable or disable the ExpandAll() option.

2. The nodes are not expanded/collapsed when the TreeView is initialized.

A REPL sample for reproduction: https://netcorerepl.telerik.com/mSuMEPkZ10ZA6l8P00

### Expected/desired behavior

All nodes must be initially expanded when ExpandAll(true) is set.

### Environment

* **Telerik UI for ASP.NET Core version: 2024.2.514
* **Browser: [all]