When realtime connectivity is off, a graphical line is started from a dangling wire/bus end.

Description

When experimenting with effects of #9628 (closed), I noticed, that when clicking a dangling wire/bus end with dirty connectivity, a graphical line is started.

line-from-dangling-wire

This is coming from a crash fix for #10394 (closed).

Steps to reproduce

1. Do heavy slow stuff in Schematic editor (like copying a lot of symbols) to trigger #9628 (closed) realtime connectivity safety valve
2. Draw some wires/buses (without refreshing).
3. Click on a dangling end: a graphical line is started.

KiCad Version

Application: KiCad (64-bit)

Version: (6.0.1), release build

Libraries:
	wxWidgets 3.1.5
	libcurl/7.78.0-DEV Schannel zlib/1.2.11

Platform: Windows 10 (build 18363), 64-bit edition, 64 bit, Little endian, wxMSW

Build Info:
	Date: Jan 15 2022 13:36:27
	wxWidgets: 3.1.5 (wchar_t,wx containers)
	Boost: 1.76.0
	OCC: 7.5.0
	Curl: 7.78.0-DEV
	ngspice: 35
	Compiler: Visual C++ 1929 without C++ ABI

Build settings:
	KICAD_USE_OCC=ON
	KICAD_SPICE=ON