BigBlueButton: add option to hide the videoconference link field in the course

[MAMEK70]

Describe
BigBlueButton sessions URL is always visible even when the "Global conference link only visible for these user roles" option is set only to Administrator

To Reproduce

1. Go to 'adminstration/plugins/bbb/'
2. Scroll down to "Global conference link only visible for these user roles" and set it to "Administrator"
3. Go to a Course, open a Videoconference
4. The error: The VideoConference URL is visible to all (teacher, student, etc...)

Expected behavior
The videoconference url should be hidden to students and teachers (in this case)

Screenshots

Desktop

• Windows 10
• chrome 85.0.4183.83 (Official Build) (64-bit)

**Server

• Version of Chamilo: 1.11.12

[aelalfey]

@MAMEK70

I have the same issue and more. Check this #3472

[MAMEK70]

@aelalfey
Pls let me know if you find a solution...

[jmontoyaa]

The global conference link is located here ( see screenshot link Videoconference below "Edit profile").

In your screenshot your're showing a course videoconference.

[lonesomewalker]

@jmontoyaa
Yes, but this also should be possible to disable by default ;-)

[ywarnier]

So just to make this issue clear: the request is to add an option to avoid showing the link (in text) to the videoconference to the users, because in some cases we just want them to see in an obvious way the server on which it is hosted (or something like that).