fix: update MSUI Help Section

[divyaajainn]

Fixes #2600

Purpose of PR?:

1. Added Tab in the Help section of MSUI which will have instructions on how to upload a profile picture.
   

2. Updated the chat window which now shows profile photo and
   online indicator feature.
   

[ReimarBauer]

Please use similiar to the old images, names which we like to see by a user.

in the previous example, we had also a meaningful conversation.

[ReimarBauer]

It is also not good to add your e-mail address there, this gives some more spam.

When you use as in the old example John Doe, it is constistant with what happens in the chat using this user. And the other users are also in the other pngs.

[ReimarBauer]

Just seen it is draft, sorry, I was looking already.

[divyaajainn]

That's alright! Thank you for the review. I'll make the necessary changes.

[ReimarBauer]

it looks like ui_mscolab_help_dialog.py was edited manually. In case you did, there are linting failures which usually is avoided by pyuic5 --from-imports

[ReimarBauer]

the name upload-profile is a bit misleading it is more like add-profile-image
you do describe the action

[ReimarBauer]

while looking on the chat picture again now I realized, that the role admin is a bit too often there. creator can give admin role to someone to add users with roles. commonly we have more with the collaborator role than with admin.
admin role has also all collaborator options. So it is not wrong.