Frontend routing
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In Sulu's backend UI it is not like you click on a link and get redirected to a whole another page. Basically
there are only two main pages which you can redirect to in that sense that they load everything from start, namely
the admin- and the login-page.
For your own bundle you have to tell the frontend framework which route corresponds to which view. If a user then
navigates to the route you have configured, the frontend framework grabs your view-component and renders it in
the content-column. For defining routes we use `backbone.js