minimum width of appearance panel: unnecessary wide

Description

The appearance panel in the Footprint editor seems to contain two values for minimum-width:

• minimum width during work
• minimum width at startup of FP-editor

These minimum-values are:

• not identical
• much bigger than in kicad v6 --> this leads to a unnessary wide appearance panel at startup as well as during work in the footprint editor

Steps to reproduce

1. start kicad
2. open footprint-editor from kicad-manager
3. notice width of appearance-panel: very wide (see picture 3)
4. drag appearance panel to the smallest allowed width (see pic 4).
5. compare this situation with same situation of kicad v6 (compare pic2 <--> pic4): v7 needs much more screen estate for appearance panel
6. close FP-editor
7. reopen FP-editor
8. now the appearance-panel has again a big width (see pic3), on every FP-editor startup it's necessary to manually shrink the appearance panel to the smallest available width (and even that is wider than v6)

KiCad Version

Application: KiCad Footprint Editor x64 on x64

Version: 7.0.1-5-g4e775a4090, release build

Libraries:
	wxWidgets 3.2.2
	FreeType 2.12.1
	HarfBuzz 6.0.0
	FontConfig 2.14.1

Platform: Windows 10 (build 19044), 64-bit edition, 64 bit, Little endian, wxMSW

	wxWidgets: 3.2.2 (wchar_t,wx containers)
	Boost: 1.81.0
	OCC: 7.6.3
	Curl: 7.88.1-DEV
	ngspice: 39
	Compiler: Visual C++ 1934 without C++ ABI

Build settings:
	KICAD_SPICE=ON