Participants count in call inaccurate

[gerbrent]

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Steps to reproduce

1. be in a call with many participants
2. note the total participants number active in the call is incorrect

Expected behaviour

Call participant count should reflect actual participant count

Actual behaviour

Here, the participant count (top bar, beside call duration counter) is 3, but clearly there are more participants

Talk app

Talk app version: (see apps admin page: /index.php/settings/apps)

Custom Signaling server configured: yes/no and version (see additional admin settings: /index.php/index.php/settings/admin/talk#signaling_server)

Custom TURN server configured: yes/no (see additional admin settings: /index.php/settings/admin/talk#turn_server)

Custom STUN server configured: yes/no (see additional admin settings: /index.php/settings/admin/talk#stun_server)

Browser

Microphone available: yes/no
no

Camera available: yes/no
no

Operating system: Windows/Ubuntu/...
Linux/openSUSE Tumbleweed

Browser name: Firefox/Chrome/...
Firefox

Browser version: 85/96/...
118.01

Browser log

``` Insert your browser log here, this could for example include: a) The javascript console log b) The network log c) ... ```

Server configuration

cloud.nextcloud.com

Operating system: Ubuntu/RedHat/...

Web server: Apache/Nginx

Database: MySQL/Maria/SQLite/PostgreSQL

PHP version: 8.0/8.1/8.2

Nextcloud Version: (see admin page)

List of activated apps:

If you have access to your command line run e.g.:
sudo -u www-data php occ app:list
from within your server installation folder

Nextcloud configuration:

If you have access to your command line run e.g.:
sudo -u www-data php occ config:list system
from within your Nextcloud installation folder

Server log (data/nextcloud.log)

Insert your server log here

[Antreesy]

getParticipants() mixin depends on isActive prop, and will update participants list only when true.
Should be the reason why it's not happening for TopBar and open RightSidebar with ParticipantsTab as inactive tab