Dimension "arrow direction" control is in a weird place

Description

V9 dimensions can have the arrow pointing inwards or outwards. This is controlled with a dropdown in the Dimension Properties dialog.

Right now this control is under the "Dimension Format" section with the controls for precision, units, text prefix/suffix, etc. It feels a bit misplaced here, as everything else in this section controls the number format. I think it would be better in the "Dimension Line" section with the line/arrow settings.

Steps to reproduce

1. Place a dimension
2. Open Dimension Properties dialog

KiCad Version

Application: KiCad PCB Editor x86_64 on x86_64

Version: 9.0.0-160-g7116be4ae0, release build

Libraries:
	wxWidgets 3.2.6
	FreeType 2.13.3
	HarfBuzz 10.3.0
	FontConfig 2.16.0

Platform: Arch Linux, 64 bit, Little endian, wxGTK, X11, KDE, x11
OpenGL: Intel, Mesa Intel(R) Iris(R) Plus Graphics 655 (CFL GT3), 4.6 (Compatibility Profile) Mesa 24.3.4-arch1.1

	wxWidgets: 3.2.6 (wchar_t,wx containers) GTK+ 3.24
	Boost: 1.87.0
	OCC: 7.8.1
	Curl: 8.12.1
	ngspice: 43
	Compiler: GCC 14.2.1 with C++ ABI 1019

Build settings:
	KICAD_USE_EGL=ON
	KICAD_IPC_API=ON

Locale: 
	Lang: en_US
	Enc: UTF-8
	Num: 1,234.5
	Encoded кΩ丈: D0BACEA9E4B888 (sys), D0BACEA9E4B888 (utf8)