title: ExtJS 4.2.1 Navigation between different Views - best practice
body: <p>Im going to write an ExtJS Application in which i need to Navigate between several Views..
  Im questioning myself right now what the best practice is for this issue..</p>
  
  <p>One solution with which im not really 100% happy is to change my url when i press on a link/button in combination with a TaskRunner which is always checking if the url has been changed.</p>
  
  <p>I do also want a history so when i do press the "back" button in my browser i can jump back to the former view which would work with the solution above.
  I dont know if the solution above is taking much resources?</p>
  
  <p>Is there a better way? Do you think that my solution is ok? Please tell me!
  If you need any more information dont hesitate to ask ;) </p>