[openstreetmap-website] Favorite is created at wrong position (#944)

[robwe]

1) Click on a map so that the box with the location is added to the map at the position where the map was clicked on.
2) In the menu select "Use location ..." and then "Add to favorites".
3) Choose a name and click Add.
Now the favorite is added but at a location that is different from the clicked position. Depending on the current scale with which the map is displayed, the position can be off by miles.

The attachment is actually an mp4 file with a short video of how to reproduce the bug (you might to have to change the extension to mp4).


![bug_selecting_position_as_favorite mp4](https://cloud.githubusercontent.com/assets/11790822/6989397/23a53428-da5b-11e4-8338-055201c27e91.jpg)


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Reply to this email directly or view it on GitHub:
https://github.com/openstreetmap/openstreetmap-website/issues/944
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