symbol fields table: reordering columns changes column-width as a side-effect

Description

If the column-order is changed in the symbol fields table dialog this also can change the column-width of other columns.

Steps to reproduce

1. open any project, open schematic with some symbols
2. open the symbol fields table
3. select the standard available Preset "Grouped by Value" (see picture 1)
4. change the size of the footprint-column (see picture 2)
5. drag the "Value" column-header one position to the right (see picture 3 - shows dragging in action)
6. this exchanges position of "Value" column and "Datasheet"-column.
7. After the position-exchange observe: the width of the "Footprints"-column is back to initial width (see picture 4)

KiCad Version

Application: KiCad Schematic Editor x64 on x64

Version: 7.99.0-3657-g5cf244dd90, release build

Libraries:
	wxWidgets 3.2.4
	FreeType 2.12.1
	HarfBuzz 8.2.1
	FontConfig 2.14.2

Platform: Windows 10 (build 19045), 64-bit edition, 64 bit, Little endian, wxMSW

	wxWidgets: 3.2.4 (wchar_t,wx containers)
	Boost: 1.83.0
	OCC: 7.7.1
	Curl: 8.4.0-DEV
	ngspice: 41
	Compiler: Visual C++ 1936 without C++ ABI

Build settings: