Enhance top/quick navigation provision - enable header provision

[SubPointSupport]

M2 should allow to provision navigation item as a Header.

Top/quick navigation definition should have additional property to indicate header, both CSOM/SSOM should be supported.

Based on community feedback - "Provision Quick Launch #817"
#817

[SubPointSupport]

A new property called "Properties" will be added to expose and map SPNavigation.Properties

That would enable a full control over additional SPNavigation properties including NodeType = Heading. Unfortionayly available only in SSOM, no CSOM support due to a gap in SharePoint API.

• http://www.sharepointdiary.com/2012/07/feature-for-customizing-top-navigation.html
• http://sharepoint.stackexchange.com/questions/144971/sharepoint-2013-client-object-model-navigationnode-properties
• http://kvdlinden.blogspot.com.au/2011/02/add-spnavigation-heading-to-quicklaunch.html

[SubPointSupport]

.Properties property was added mapping the SPNavigation.Properties to M2 definition.

Implemented for SSOM with the following tests:

• CanDeploy_Simple_TopNavigation_As_Heading
• CanDeploy_Simple_TopNavigation_As_AuthoredLinkPlain
• CanDeploy_Simple_QuickLaunchNavigationNode_As_Heading
• CanDeploy_Simple_QuickLaunchNavigationNode_As_AuthoredLinkPlain