feat: Clean up immediately when room is not joined.

When receiving error like max occupants reached we have not joined the room, and there is no point of sending presence unavailable and check and clean after 5 secs.

modules/xmpp/ChatRoom.js

                 }
             };
 
-            timeout = setTimeout(() => onMucLeft(true), 5000);
+            if (this.joined) {
+                timeout = setTimeout(() => onMucLeft(true), 5000);
 
-            this.clean();
-            this.eventEmitter.on(XMPPEvents.MUC_LEFT, onMucLeft);
-            this.doLeave(reason);
+                this.clean();
+                this.eventEmitter.on(XMPPEvents.MUC_LEFT, onMucLeft);
+                this.doLeave(reason);
+            } else {
+                // we are clearing up, and we haven't joined the room
+                // there is no point of sending presence unavailable and check for timeout
+                // let's just clean
+                this.connection.emuc.doLeave(this.roomjid);
+                this.clean();
+            }
         }));
 
         return Promise.allSettled(promises);