U4-4510 nuget targets file creates an invalid path in the property group

That should fix this one properly now
Fixes: U4-4455 Javascript error with single quotes in literals

Conflicts:
	src/Umbraco.Web.UI/umbraco_client/Editors/EditScript.js
Merge remote-tracking branch 'origin/6.2.0' into 7.1.0

Conflicts:
	build/Build.proj
	build/NuSpecs/UmbracoCms.Core.nuspec
	build/NuSpecs/build/UmbracoCms.targets
	build/NuSpecs/tools/install.ps1
	src/Umbraco.Web.UI/umbraco_client/Editors/EditScript.js