Bug in wicket-bootstrap's Navbar

[Richter, Marvin]

Hi Martin & Michael,

There is a bug in the Navbar Component which causes NavbarDropDownButtons to 
not work.

DropDownButton's newInitializerScript function uses 'this' so in the header it 
renders: $('#component2 .dropdown-toggle').dropdown();

But the Navbar component does not call setOutputMarkupId(true) on the 
components contained in the alignedComponentListViews.

Best,
Marvin