Multiple Ui improvements (#7029)

* PLT-7119 - Updating headings on compact view

* PLT-7103 - Removing line below channel intro

* PLT-7112 - Fixing system console banner

* PLT-7144 - Adding ellipsis to system console boxes

* PLT-7181 - Changing channel header opacity

* PLT-6899 - Updating unread bar

* Updating margin for new messages indicator

webapp/components/admin_console/database_settings.jsx

@@ -108,12 +108,12 @@ export default class DatabaseSettings extends AdminSettings {
 
         return (
             <SettingsGroup>
-                <p>
+                <div className='banner'>
                     <FormattedMessage
                         id='admin.sql.noteDescription'
                         defaultMessage='Changing properties in this section will require a server restart before taking effect.'
                     />
-                </p>
+                </div>
                 <div className='form-group'>
                     <label
                         className='control-label col-sm-4'