Sketcher: Keyboard arrow keys not focusing to dynamic input box to change the value

### Is there an existing issue for this?

- [x] I have searched the existing issues

### Problem description

Hello everyone!
When you draw something if you want to use keyboard arrow keys they are not focusing to input box instead they are panning the whole drawing

For example, if you want to make 33,73 to 3,373 you can use left arrow keys on keyboard

https://github.com/user-attachments/assets/e595abde-182c-4768-985f-efdd329a828c

### Full version info

```shell
OS: Windows 10 build 19045
Architecture: x86_64
Version: 1.1.0dev.42564 (Git)
Build date: 2025/07/14 18:51:42
Build type: Release
Branch: main
Hash: dc2f2374b6ab3e3381653fad125b1b619bb49f7c
Python 3.11.13, 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 3.2.5, IfcOpenShell 0.8.2, OCC 7.8.1
Locale: Turkish/Türkiye (tr_TR)
Navigation Style/Orbit Style/Rotation Mode: Blender/Trackball/Drag at cursor
Stylesheet/Theme/QtStyle: unset/FreeCAD Classic/fusion
Logical DPI/Physical DPI/Pixel Ratio: 96/81.5973/1
Installed mods:
* Curves 0.6.61
```

### Subproject(s) affected?

Sketcher

### Anything else?

_No response_

### Code of Conduct

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

Start in the Sketcher subproject by reproducing the dynamic input box interaction with keyboard arrow keys on the reported Windows configuration. Trace how focus is handled when drawing and verify that arrow keys edit the input value rather than pan the drawing; done means the value can be changed with the arrows without unintended panning.

Written by the indexing model from the issue text.