When bookmarksbar is shown, the content of the browser is moved

[GoogleCodeExporter]

Enhancement:

If I re-show the hidden bookmarksbar, the content of the browser is moved a 
little bit to the bottom. It would be a lot more nicer to use your addon, if 
the bookmarksbar would just "hover" over the browser content (or the browser 
content would be scrolled up a little bit to compensate the appearing of the 
bar).

I know, probably a lot's of people would not like this effect, but maybe you 
could make this an option?

Thanks for your efforts!

Original issue reported on code.google.com by [email protected] on 1 Dec 2012 at 12:54