External links should load in external browser

[GoogleCodeExporter]

When there is an external link on a page we should not load it
in our application's browser control, it should load in system's
default browser.

In our application's web-browser control we should allow loading only
urls starting with http://127.0.0.1:54007/.

Maybe we should allow to customize this behavior, a list of urls
that should be allowed to load in web-browser control and all
others should be run in system's default browser.

Original issue reported on code.google.com by [email protected] on 13 Jan 2013 at 3:04