Add IDs to Team Settings, Channel Settings, Account Settings (Display & Advanced) (#5823)

* Add IDs to Channel Notification Preferences

* Add IDs to Display Settings

* Add ID to language dropdown

* Add Ids

* Add ids

* Add Ids

* Add Ids

* Add Ids

* Add Id

* Add Ids

* Add Ids

* Fix duplicate Id

webapp/components/channel_invite_button.jsx

@@ -55,6 +55,7 @@ export default class ChannelInviteButton extends React.Component {
     render() {
         return (
             <SpinnerButton
+                id='addMembers'
                 className='btn btn-sm btn-primary'
                 onClick={this.handleClick}
                 spinning={this.state.addingUser}