Popper in Tooltip always executes positioning code

[lucivpav]

Bug Report

The Tooltip's Popper's positioning code is always executed, even if the tooltip content is not visible to the user. This is a performance issue if we have many Tooltip components.

Expected Result

The content positioning code is only executed when the content is visible to the user.

Actual Result

The content positioning code is executed even if the content is not visible 💣

Version

0.37.0

[layershifter]

A bit rephrase:
We should render children, we should not execute positioning stuff in Popper until it's visible.