Remove Promise in componentDidMount and tests

[MartinBruun]

Remove the promise in componentDidMount in WholeApp, since it unnecessarily creates a 2 second waiting time when the app starts. It should rather activate the tooltips at the moment the component has mounted.

Also, if changed, it is important the tests will be changed to only use a waitFor, instead of a SetTimeout. To check if the solution works, simply remove the SetTimeout in the Tooltips.int.test.js, and when they are green, they should work as intended.