Associate pads with meetings so session validation is restricted to the
meeting's valid session tokens.

Meteor will dispatch new redis events on shared notes and closed captions
pads creation. This event will go through apps and reach web to populate
a new meeting's pad collection that contains all valid pad id's for that
session. Nginx will use this collection to check if the user's session token
belongs to the pad's authorized users.

Besides these modifications, an extra change will be needed at notes.nginx.
Location /pad/p/ needs to change it's auth_request:

from /bigbluebutton/connection/checkAuthorization;
to /bigbluebutton/connection/validatePad;

When managing Etherpad's pads, Meteor makes API calls to initiate the closed captions
and shared notes modules. The pad id was being mapped to a shorter id than the meeting
id because of a Etherpad lenght limitation.

Changed to something less guessable.

Set default cursorInterval to 150ms (was 40ms)

9101 add poll abstention

video-provider: fix inconsistent client state when a webcam being shared times out

Update axios to 0.21.1

Add heapdump threshold in settings

Prevent open textarea blocking dropdown menus

audio: fix talking-indicator mute debounce

video-provider: Revert "Improve 16x9 Support"

video-provider: make video-list-item actions dropdown keys unique

audio: add a configurable throttle to action-bar`s mute toggle

Fix wrong path in settings for audio constraints

Using now 'application' instead of old 'audio' path

When multiple actions were bolted in the dropdown (mirror, focus), keys were getting duplicated with cameraId. Make them unique based on the action`s name

This reverts commit b8fc94c7.

Recent fix to the stop all cameras behaviour exposed a bug where the local camera connecting state wasnt being cleared up when a camera timed out before being successfully shared

Default value is 300ms, with default trailing/leading. Set toggleMuteThrottleTime to 0 to restore old behaviour

The debounce method argument was being passed wrong (its supposed to be a method, not a function call), thus spewing exceptions in the console and rendering the debounce virtually ineffective

Avoid setting empty/undefined constraint

This removes the console warning about invalid constraint

Add setting for enabling/disabling microphone audio filters

As explained in #11143, disabling audio filters is desired in some scenarios.
This basically adds an option for user to disable default constraints.
When user doesn't change this value in Settings > Application, the default
value for each audio constraints is retrieved from settings.yml.
When user changes this value in Settings > Application, audio
filters (AGC, Noise Supression and Echo Cancellation) are all set to
true/false, according to the value selected in the Settings GUI.

To start it simple, we decided to not to add a different setting in the GUI for
each audio contraint. This may be added in the future, though (perhaps in a
dedicated Audio Settings tab)
This is related to #4873

Throttle user typing indicator function

Configurable annotation and cursor interval

Improve 16x9 Support

Fix stream stop for multiple webcams

Allow audio constraints to be changed in bbb-html5's settings.yml

In some scenarios, there's no need for the browser to apply such audio filters. For example, when user's microphone already does audio filtering (echo cancellation, noise supression ...).
This commit doens't change the current behavior (filters still follow browser's default config): admins need to uncomment/set these values if disabling/enabling specific filters if desired.
This is related to #4873

Video provider's service for local stream control was wrongly setting the disconnected
state when a multiple webcam user tried to stop a single cam. The `stopVideo` method
was inconsistent when called multiple times for the same `cameraId`.

Included a better testing scope for event dispatching and disconnected state handling.

Check if stream already exists before adding in list