[Feature Request] Indication of availability of alternate pin assignments

Description

Currently you do not see that alternate pin assignments are available unless you click on the field. For symbols with a high pin count that's not conducive to a proper workflow. Availability of alternate pin assignments should be indicated, e.g. by displaying the dropdown arrow regardless.

kicad_qfdlhIPIqi

Steps to reproduce

KiCad Version

Application: KiCad Schematic Editor x64 on x64

Version: (7.99.0-178-g365c7be4ed), release build

Libraries:
	wxWidgets 3.2.2
	FreeType 2.12.1
	HarfBuzz 6.0.0
	FontConfig 2.14.1

Platform: Windows 11 (build 22621), 64-bit edition, 64 bit, Little endian, wxMSW

	wxWidgets: 3.2.2 (wchar_t,wx containers)
	Boost: 1.81.0
	OCC: 7.6.2
	Curl: 7.87.0-DEV
	ngspice: 39
	Compiler: Visual C++ 1934 without C++ ABI

Build settings:
	KICAD_SPICE=ON