ui: session - add a "Disconnect" button to the Session Timeout Warning Dialog

[christophercr]

I'm submitting a...

[ ] Regression (a behavior that used to work and stopped working in a new release)
[ ] Bug report  
[X] 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 the Session Timeout Warning Dialog appears the user can take 2 actions:

• if he wants his session to expire, he needs to wait until the countdown finishes and then it will be automatically logged out.
• if he wants to keep his session alive, he needs to click on the "Stary Connected" button.

Expected behavior

From the user's point of view it would be nice if he could also have also a third option: click on a "Disconnect" button if he wants to be logged out immediately without having to wait for the countdown to finish.

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

Better user experience.

Environment

Stark version: 10.0.0