Show number of participants in sidebar

src/plugins/muc-views/templates/muc-sidebar.js

@@ -4,11 +4,11 @@ import tpl_occupant from "./occupant.js";
 
 
 export default (o) => {
-    const i18n_participants = __('Participants');
+    const i18n_participants = o.occupants.length === 1 ? __('Participant') : __('Participants');
     return html`
         <div class="occupants-header">
             <div class="occupants-header--title">
-                <span class="occupants-heading">${i18n_participants}</span>
+                <span class="occupants-heading">${o.occupants.length} ${i18n_participants}</span>
                 <i class="hide-occupants" @click=${o.closeSidebar}>
                     <converse-icon class="fa fa-times" size="1em"></converse-icon>
                 </i>