Notes:
Add-new-tab button is rendered in header as extra tab item located after all normal tab items.
Rendering of special add-new-tab button for MultiRow mode is not supported.
Target Platforms: Windows 10, Windows 8.1, Windows 8, Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2