Steps to reproduce:

1. Browse to Source -> <repo> -> <click on the folder name>
2. Note that the URL on the browser did not synchronize with the folder selected but the URL of the 'Watch' link does show it correctly (screenshot-1)
3. Click on the 'Watch' link does not take any effect (screenshot-1_result)
4. Try to select one of the file in the folder and watch it. (screenshot-2)
5. The file has been added successfully into the watches list (screenshot-2_result)
6. Try to select the folder again. This time the URL on the browser does show it correctly (screenshot-3)
7. Watch the folder take the effect now (screenshot-3_result)