TechDraw: Show all center marks in TechDraw DetailView

### Is there an existing issue for this?

- [X] I have searched the existing issues

### Problem description

In TechDraw, the Detail view shows only the center marks of arcs shown in the Detail view.

Feature request: Show all center marks of the whole view also in DetailView.
As the center mark of the DetailView itself clutters the view, it should be suppressed.

Forum discussion: [https://forum.freecad.org/viewtopic.php?t=82275](https://forum.freecad.org/viewtopic.php?t=82275).

### Full version info

```shell
OS: macOS 13.0
Word size of FreeCAD: 64-bit
Version: 0.22.0dev.34789 (Git)
Build type: Release
Branch: main
Hash: 41503d63ebc3de96d156e6eb0cdb889ebb150bd4
Python 3.10.12, Qt 5.15.8, Coin 4.0.0, Vtk 9.2.5, OCC 7.6.3
Locale: C/Default (C)
Installed mods:
* FC_SU
* freecad.gears 1.0.0
* FeedsAndSpeeds 0.5.0
* dxf-library
* fcgear 1.0.0
* fasteners 0.4.59
* sheetmetal 0.2.62
* ExplodedAssembly
* Curves 0.6.8
```

### Subproject(s) affected?

Techdraw

### Anything else?

_No response_

### Code of Conduct

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

Start at the TechDraw DetailView entry point and trace how center marks are selected for the detail and source views. Compare the requested output with the attached examples, then verify that all source-view center marks appear while the DetailView's own center mark is suppressed.

Written by the indexing model from the issue text.