Sketcher: Text tool doesn't preserve last font

### Problem description

This makes it harder to use a consistent font on a project.

### Workbench affected?

Sketcher

### Steps to reproduce

https://github.com/user-attachments/assets/1b0d7e93-7efe-475f-b1fd-9cd002cb571b

### Expected behavior

Font selection should be persisted between sessions. I would say that width mode/height mode should also be preserved between sessions.

### Actual behavior

The same default font is used every time.

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

```shell
OS: Arch Linux (sway/wayland)
Architecture: x86_64
Version: 1.2.0dev.20260311 (Git shallow) AppImage
Build date: 2026/03/11 07:18:44
Build type: Release
Branch: (HEAD detached at 03fc08d02)
Hash: 03fc08d02ebbafa0dc7268d8a7f89e17d3b4db87
Python 3.11.14, Qt 6.8.3, Coin 4.0.3, Vtk 9.3.1, boost 1_86, Eigen3 3.4.0, PySide 6.8.3
shiboken 6.8.3, xerces-c 3.3.0, IfcOpenShell 0.8.2, OCC 7.8.1
Locale: C/Default (C)
Navigation Style/Orbit Style/Rotation Mode: Blender/Trackball/Window center
Stylesheet/Theme/QtStyle: FreeCAD.qss/FreeCAD Dark/
Logical DPI/Physical DPI/Pixel Ratio: 96/108.398/1
Installed mods:
* Gridfinity Workbench 0.12.0
```

### Last known good version (optional)

```shell

```