Revert "[BUGFIX] Display Hallo toolbar correctly when page has a global margin set"

the real root-cause of the problem was introduced by having a "position:relative"
style on the "body"-Tag (due to the use of the Zurb Foundation framework).
Removing this style, the positioning problem is solved.

This reverts commit 34e4a6fef0213b9b0164200179358268ab1de23c.