Cannot hide the module panel dock widget on start up

I am trying to develop a Slicer Custom App without a module panel.

I tried to add the following code to `qTalk2ViewAppMainWindowPrivate::setupUi`:
```
this->PanelDockWidget->setVisible(false);
```
but the module panel is still visible.

I can hide it manually after the app is running using this Python code inside Home.py's `setSlicerUIVisible` function
```python
# Module panel
modulePanelDockWidget = slicer.util.mainWindow().findChild('QDockWidget','PanelDockWidget')
modulePanelDockWidget.setVisible(visible)
```
However, it is always shown on startup.

Start by tracing qTalk2ViewAppMainWindowPrivate::setupUi and the creation of PanelDockWidget, then compare that startup path with Home.py's setSlicerUIVisible function. Confirm why setVisible(false) is overridden or ineffective during initialization; done means the module panel is hidden when the custom application first opens.

Written by the indexing model from the issue text.