make topic and user deletions "hard"

src/views/sidepanel-view.jsx

@@ -172,7 +172,6 @@ class SidepanelView extends React.Component {
             onCredDelete={this.props.onCredDelete}
             onCredConfirm={this.props.onCredConfirm}
             onBasicNavigate={this.props.onBasicNavigate}
-            onCancel={this.props.onCancel}
             onError={this.props.onError} /> :
 
           view === 'notif' ?

src/views/tinode-web.jsx

@@ -799,7 +799,7 @@ class TinodeWeb extends React.Component {
         break;
       case 'delete':
         // Ignore invitation by deleting it.
-        response = topic.delTopic();
+        response = topic.delTopic(true);
         break;
       case 'block':
         // Ban the topic making futher invites impossible.
@@ -1130,7 +1130,7 @@ class TinodeWeb extends React.Component {
   }
 
   handleDeleteAccount() {
-    this.tinode.delCurrentUser().then((ctrl) => {
+    this.tinode.delCurrentUser(true).then((ctrl) => {
       this.handleLogout();
     });
   }

src/widgets/context-menu.jsx

@@ -198,7 +198,7 @@ class ContextMenu extends React.Component {
                 console.log("Topic not found: ", params.topicName);
                 return;
               }
-              return topic.delTopic().catch((err) => {
+              return topic.delTopic(true).catch((err) => {
                 if (errorHandler) {
                   errorHandler(err.message, 'err');
                 }