UX improvements to the import session flow

```


-  Response to case 18

-  Canceling the confirmation opens session file in browser

-  Drag and drop should overload all default handlers

-  Implement a browser toolbar button

-  Implement a GroupBar menu item

-  Acceptance testing


```

Original issue reported on code.google.com by `tgmj...@gmx.com` on 8 Sep 2013 at 7:26
