Draft: When moving Draft_Mirrored elements to layer, source objects do not take over layer properties

### Is there an existing issue for this?

- [X] I have searched the existing issues

### Problem description

When moving Draft_Mirrored elements to layer, only the copied/mirrored elements take over layer properties.

Steps to reproduce:

1. Open test file [FC-mirrored-object-layer.zip](https://github.com/user-attachments/files/17088935/FC-mirrored-object-layer.zip)
2. Drag and drop the Rectangle (mirrored) element to 'Test layer' in the project tree
3. Only 1/2 of the object takes over the layer properties (line color, line type, fill color, etc.). The base object for the mirror remains with the original properties


### Full version info

```shell
OS: Windows 10 build 19045
Word size of FreeCAD: 64-bit
Version: 1.1.0dev.38794 (Git)
Build type: Release
Branch: main
Hash: a47800d9ccd7d7a7cdb1779d56de03d3c64cd76e
Python 3.11.9, Qt 5.15.13, Coin 4.0.3, Vtk 9.2.6, OCC 7.7.2
Locale: English/United States (en_US)
Stylesheet/Theme/QtStyle: unset/FreeCAD Classic/Qt default
```

### Subproject(s) affected?

Draft

### Anything else?

_No response_

### Code of Conduct

- [X] I agree to follow this project's Code of Conduct

Use the attached FC-mirrored-object-layer.zip to reproduce the Draft_Mirrored layer move in FreeCAD. Start by tracing the Draft mirror and layer-property handling from the reported drag-and-drop action; done means both the source and mirrored objects take over the Test layer's line and fill properties.

Written by the indexing model from the issue text.