Revision tool

This PR enables the replacement of our revision tool. It's now possible to

1. start the feedback from the drawing dialog
2. create a drawing from the feedback dialog

The user can then choose to attach the drawing as kml in the feedback dialg.

Please test here: [Test Link](http://mf-geoadmin3.dev.bgdi.ch/gjn_toggle_drawfeedback)

@p1d1d1 Maybe we can do a review session with Topo tomorrow, or next week.

@davidoesch Not sure about the texts of the buttons here and the UI in general (are buttons the right tool?)

@all Feedback welcome

I can't do the if/else, because on IE9, the drawing appears behind the feedback dialog on first click (don't ask me why...), so I have to bring it to the front by simulating the click on the header.

Also, I can't get rid of the timeout in any way, even when stopping the events on the feedback dialog. I added a comment to make this clear.