Ensure that help messages are always shown

src/plugins/chatview/utils.js

@@ -42,6 +42,7 @@ export function parseMessageForCommands (chat, text) {
             _converse.chatboxviews.get(chat.get('jid'))?.close();
             return true;
         } else if (match[1] === 'help') {
+            chat.set({ 'show_help_messages': false }, { 'silent': true });
             chat.set({ 'show_help_messages': true });
             return true;
         }

src/plugins/muc-views/utils.js

@@ -210,6 +210,7 @@ export function parseMessageForMUCCommands (muc, text) {
             break;
         }
         case 'help': {
+            muc.set({ 'show_help_messages': false }, { 'silent': true });
             muc.set({ 'show_help_messages': true });
             break;
         }