ui: table - actions column is displayed when no actions are defined

[SuperITMan]

I'm submitting a...

[ ] Regression (a behavior that used to work and stopped working in a new release)
[X] Bug report  
[ ] Feature request
[ ] Documentation issue or request
[ ] Support request => Please do not submit support request here, instead see https://github.com/NationalBankBelgium/stark/blob/master/CONTRIBUTING.md#got-a-question-or-problem

Current behavior

When no row actions are defined in the Stark Table component, the Actions column is displayed.

Expected behavior

When no row actions are defined in the Stark Table component, the Actions column should not be displayed.

Minimal reproduction of the problem with instructions

Go on https://stark.nbb.be/showcase/latest/demo-ui/table#selection

What is the motivation / use case for changing the behavior?

Fix a bug.

Environment

Angular version: 7.x
Stark version: 10.0.0-rc.2