Overlays do not work anymore on hacker-slides integration

[ChristianUlbrich]

It seems, that in external integration and with the currently unavoidable bleed-in, at least in hacker-slides integration the tool tips / popovers are not shown any more; or they are hidden below some other stuffz.

Repro:

• -> https://github.com/ChristianUlbrich/presentation-enterjs-2019-power-of-decorators -> getItRunning()-> ## Good Decorators - are just functions(just add some errroz)