1255 share dialog should be quittable with esc

[barisgul15]

Motivation and Context

Fixes the issue: #1255

Description

The eventlistener function to close the popup chat when esc is pressed is added to popup.ts and called in popup chat's html file.

Steps for Testing

Prerequisites:

• 1 Lecturer

1. Log in
2. Create a course with chat enabled or navigate to a course for which chat is enabled.
3. Open popup chat and press esc to quit the popup chat tab.

Screenshots

[github-actions]

Your Testserver will be ready at https://1270.test.live.mm.rbg.tum.de in a few minutes.

Logins

Kurs1	Kurs2	Kurs3	Kurs4
public	public	loggedin	enrolled
prof1	prof1	prof2	prof1 prof2
student1 student2 student3	student1 student2	student2 student3	student1 student2

[SebiWrn]

Your code is working, but I think it doesn't solve the Issue mentioned in your PR. I think the Issue meant, that the share button at the bottom of a livestream, where you can share the current stream URL is not quittable with ESC.

[barisgul15]

Your code is working, but I think it doesn't solve the Issue mentioned in your PR. I think the Issue meant, that the share button at the bottom of a livestream, where you can share the current stream URL is not quittable with ESC.

Thanks for the feedback. When I saw popup, my mind immediately went to the chat but yeap, it was about something else.

[SebiWrn]

Works as expected