Dialog popups interaction (Escape) fix

[Mil4n0r]

Checklist

• Build process is done without errors. All tests pass in the /lib directory.
• Self-reviewed the code before submitting.
• Meets accessibility standards.
• Added/updated documentation to /website as needed.
• Added/updated tests as needed.

Description
There was a PR for this (#1817) but the solution was found to not be appropiate. In the end it seems that the simplest and most appropiate solution for this case scenario is to handle the Escape button interaction for our current and future components in a special way, adding event.stopPropagation() to prevent them from closing the Dialog in case they are inside one.

Closes #1515

[GomezIvann]

Two things:

• The event propagation should only be stopped when the popovers are opened. If not, the propagation should work as usual (closing the dialog).
• We need to update the Dialog test to check this funcionality.