Adjust #8499 for 58fed457

Tweaking `RegisteredUsers.remove(u.id, liveMeeting.registeredUsers)`
since we no longer have .remove on RegisteredUsers

Split querySelector with fallback value

Merge 2.2 into develop, May 5, 2020

Fix race condition in addUserSettings

improve issue templates and issue creation process

- Added config.yml for support sources outside of Github based on list from bigbluebutton.org
- Added comment to each issue template about this issue tracker not being for general support questions
- Deleted the general-issue.md template to try to steer support requests to the google groups/forums

Update version as we work on 2.2.10

 Rework file upload and download

 - fix filename regex
 - create download flag when uploading file with that can be downloaded

 Rework presentation download and upload

 - verify presentation and meeting id formats
 - construct presentation file path making sure that they are valid
 - add "downloadable" flag to check if presentation can be downloaded or not
 - collect presentation upload errors so we can send to the client in the future

Prevent multiple users displaying as selected in user list

Disable private chat initiation in breakouts

Include Meteor connection ID in logs from client

Improve the file download in the browser

Fix live captions via dictation not displaying

Fix media overlay blocking whiteboard when drawing

Fix the spacing in the typing indicator

Add logger and upload failure error messages

Fix note id length

Update bigbluebutton-release to 2.2.8