QmlApplicationWizard: fix naming

Also the HTML code is now valid XHTML.

The latest draft of HTML 5 still suggest <br> btw.

http://www.w3.org/html/wg/drafts/html/master/


text-level-semantics.html#the-br-element

Change-Id: I436ddecd1565cb319de4385973322d7413dd8471
Reviewed-by: Robert Loehning <robert.loehning@digia.com>
Reviewed-by: Leena Miettinen <riitta-leena.miettinen@digia.com>