* Add selectors/urls to Channels
* Create utils/notification_sounds in Channels
* Move Utils.isLinux to UserAgent.isLinux
* Remove Utils.isMac in favour of UserAgent.isMac
* Move cmdOrCtrlPressed and isKeyPressed into new utils/keyboard
* Remove eslint-disable for max-lines in utils.tsx
Picks out formatjs-eslint-plugin to webapp root. Updates react-intl to 6.3.2 in all products. Executed i18n-extract and checked if any translations got changed. Although it was a major version update, the only breaking change was for a vue peer dependency. Adds "*" to take whatever dependency rule to products and declare the react-intl as the root package. Fixes a few lint and type errors cropped in due to the update No-ID rule removed from playbooks in preparation for unifying practices across products. Lastly, a few missing translations in Playbooks added
* MM-49862 - remove no longer needed webapp calls to action and pulsating dots
* fix snapshots
* improve function logic based on pr comments
* fix unit tests
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Co-authored-by: Mattermost Build <build@mattermost.com>
