fix(stark-ui): session - prevent click outside the Session Timeout Warning Dialog

[SuperITMan]

PR Checklist

Please check if your PR fulfills the following requirements:

• The commit message follows our guidelines: https://github.com/NationalBankBelgium/stark/blob/master/CONTRIBUTING.md#-commit-message-guidelines
• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

PR Type

What kind of change does this PR introduce?

[X] Bugfix
[ ] Feature
[ ] Code style update (formatting, local variables)
[ ] Refactoring (no functional changes, no api changes)
[ ] Build related changes
[ ] CI related changes
[ ] Documentation content changes
[ ] Other... Please describe:

What is the current behavior?

When the Session Timeout Warning Dialog appears, clicking outside the dialog hides the dialog but does not stop the countdown. So the user is disconnected automatically at the end of the countdown.

Issue Number: #1561

What is the new behavior?

Clicking outside of the dialog does not do anything. Like this, the user cannot close the dialog due to a wrong manipulation.

Does this PR introduce a breaking change?

[ ] Yes
[X] No

Other information

[christophercr]

The fix looks good, however the unit test should be adapted... cause right now it is failing:

Effects: StarkSessionTimeoutWarningDialogEffects
    On StarkSessionTimeoutWarning$
      ✖ Should open a dialog when the timeout countdown begins

[christophercr]

👍

[coveralls]

Coverage remained the same at 94.116% when pulling 8283216 on SuperITMan:bugfix/stark-ui-session-timeout-warning-dialog-click-escape into 4fad147 on NationalBankBelgium:master.

[nicanac]

LGTM 👍