Change of z-index causes problems

[gsibergerin]

Kind of related to issue #13, which was closed, and current pull request by itstueben.

A change of z-index to a higher value (no matter if via CSS or by changes in the script) causes disappearance of open/close animations of #jPanelMenu-menu itself - it just appears without animation. Also, while loading the page, it shows up for a second, then disappears. Tried and can´t solve this with excludedPanelContent either, nor did I find a different CSS solution for this. Unfortunately there´s content overlapping the menu due to its CSS rules (currently onboard, sorry).

Did anybody find a way to change z-index without side-effects?