Fix broken bookmarklet if params have encoded linefeeds.

Closes #4994

See details for fix [here](https://github.com/diaspora/diaspora/issues/4994#issuecomment-46431124) - thanks @Raven24 for finding that. It works perfectly.

I tried to write a failing test but ... I can make a test, [this way](http://stackoverflow.com/a/11849364/1489738) that fails if I navigate to say "bookmarkletio" but runs through with the correct navigate. But it doesn't fail without the fix if I give it a full url with encoded linefeeds.