[BUGFIX] negative entryLevel is one page off

entryLevel = -1 should correspond to current page, i.e. the last item in rootline. If we remove 1 here, then entryLevel = -1 corresponds to parent page, and there is no way to select menu relative to current page.
Merge pull request #704 from cbrunet/patch-2

[BUGFIX] negative entryLevel is one page off