If a track violates a design rule, it cannot be dragged.

Description

2021-06-18-15-13-21

Steps to reproduce

1. Creat a track with a DRC violation at the and (highlight collision: --> Allow DRC violations)
2. switch PNS mode to "Shove"
3. Any segement of the track cannot be dragged.

P.S. Sometimes it make sense to allow DRC violations (e.g. changing a footprint)

KiCad Version

Application: KiCad PCB Editor (64-bit)

Version: (5.99.0-11059-g7953a5c62b), release build

Libraries:
	wxWidgets 3.1.5

Platform: Windows 10 (build 19041), 64-bit edition, 64 bit, Little endian, wxMSW

	wxWidgets: 3.1.5 (wchar_t,STL containers)
	Boost: 1.75.0
	OCC: 7.5.0
	Curl: 7.74.0-DEV
	ngspice: 34
	Compiler: Visual C++ 1928 without C++ ABI

Build settings:
	KICAD_USE_OCC=ON
	KICAD_SPICE=ON