Sketcher: Units displayed wrong in dimensions

### Problem description

In sketcher, but possible also in other workbenches the values and/or units are displayed wrong.
When checking reference, the unit and value are suddenly shown correctly.

This can be also related to issues #29490, #29114, #27948

### Workbench affected?

Sketcher

### Steps to reproduce

https://github.com/user-attachments/assets/8b2b9b72-6639-4f1c-be32-34a8904fe835

### Expected behavior

Show the correct unit and or value.

### Actual behavior

In my case, the value is 10x to high. I got an FYI in my repo from a user: https://github.com/APEbbers/FreeCAD-Ribbon/discussions/458#discussioncomment-16757450.

He has a totaly wrong value and unit.

### Development version About Info (in Safe Mode)

```shell
OS: EndeavourOS (KDE/plasma/wayland)
Architecture: x86_64
Version: 1.2.0dev.46489 (Git)
Build date: 2026/04/17 17:25:03
Build type: Unknown
Branch: main
Hash: 8e24fdc07ad23977c3f6fbf54ec1751a6515e0b3
Python 3.14.4, Qt 6.11.0, Coin 4.0.8, Vtk 9.6.1, boost 1_91, Eigen3 5.0.1, PySide 6.11.0
shiboken 6.11.0, SMESH 7.7.1.0, xerces-c 3.3.0, IfcOpenShell 0.8.5-alpha2601161257, OCC 7.9.3
Locale: English/United Kingdom (en_GB)
Stylesheet/Theme/QtStyle: OpenDark.qss/OpenDark/
Navigation Style/Orbit Style/Rotation Mode: SiemensNX/Free Turntable/Object center
Logical DPI/Physical DPI/Pixel Ratio: 96/141.585/1
Installed mods:
* Bill of Materials Workbench 1.1.0.1
* SearchBar 1.8.0
* CfdOF 1.34.19
* Addon Manager 2026.2.19
* OpenTheme 2025.5.20
* SaveAndRestore 0.2.2
* Supplemental Materials 1.0.2
* FreeCAD Ribbon 1.11.0dev
* Woods 1.1.0
* Assembly4.1 0.60.2-0.1
```

### Last known good version (optional)

```shell

```