Bus unfolding displays resolved net names, not local names

Description

If a bus subgraph has a resolved name different from its local label, we are now showing the resolved bus member names in the unfolding menu rather than the local member names. Originally the local names were shown and this is better behavior because the resolved names don't stand alone if the sheet is removed from its place in the hierarchy. We should go back to showing the local member names in the unfolding menu.

KiCad Version

Application: Eeschema

Version: (5.99.0-8513-g351074cc48-dirty), debug build

Libraries:
	wxWidgets 3.0.4

Platform: Linux 5.4.0-60-generic x86_64, 64 bit, Little endian, wxGTK, ubuntu, x11

	wxWidgets: 3.0.4 (wchar_t,wx containers,compatible with 2.8) GTK+ 3.24
	Boost: 1.71.0
	OCE: 6.9.1
	Curl: 7.68.0
	ngspice: 31
	Compiler: GCC 9.3.0 with C++ ABI 1013

Build settings:
	KICAD_SCRIPTING=ON
	KICAD_SCRIPTING_MODULES=ON
	KICAD_SCRIPTING_PYTHON3=ON
	KICAD_SCRIPTING_WXPYTHON=ON
	KICAD_SCRIPTING_WXPYTHON_PHOENIX=ON
	KICAD_SCRIPTING_ACTION_MENU=ON
	KICAD_USE_OCE=ON
	KICAD_SPICE=ON
	KICAD_STDLIB_DEBUG=OFF
	KICAD_STDLIB_LIGHT_DEBUG=OFF
	KICAD_SANITIZE=OFF