Update the icon name changed by the Font Awesome 5. (#8776)

app/javascript/mastodon/features/compose/index.js

@@ -90,7 +90,7 @@ class Compose extends React.PureComponent {
             <Link to='/timelines/public' className='drawer__tab' title={intl.formatMessage(messages.public)} aria-label={intl.formatMessage(messages.public)}><i role='img' className='fa fa-fw fa-globe' /></Link>
           )}
           <a href='/settings/preferences' className='drawer__tab' title={intl.formatMessage(messages.preferences)} aria-label={intl.formatMessage(messages.preferences)}><i role='img' className='fa fa-fw fa-cog' /></a>
-          <a href='/auth/sign_out' className='drawer__tab' data-method='delete' title={intl.formatMessage(messages.logout)} aria-label={intl.formatMessage(messages.logout)}><i role='img' className='fa fa-fw fa-sign-out' /></a>
+          <a href='/auth/sign_out' className='drawer__tab' data-method='delete' title={intl.formatMessage(messages.logout)} aria-label={intl.formatMessage(messages.logout)}><i role='img' className='fa fa-fw fa-sign-out-alt' /></a>
         </nav>
       );
     }

app/views/layouts/modal.html.haml

@@ -9,7 +9,7 @@
         = t 'users.signed_in_as'
         %span.username @#{current_account.local_username_and_domain}
       = link_to destroy_user_session_path(continue: true), method: :delete, class: 'logout-link icon-button' do
-        = fa_icon 'sign-out'
+        = fa_icon 'sign-out-alt'
 
   .container-alt= yield
   .modal-layout__mastodon