[mirotalksfu] - improve chat messages UI

public/views/Room.html

@@ -358,12 +358,14 @@
                     <!-- chat messages -->
                 </main>
                 <div class="chat-msger-inputarea">
-                    <input
+                    <textarea
+                        rows="1"
+                        cols="1"
                         id="chatMessage"
                         class="chat-msger-input"
                         type="text"
                         placeholder="💬 Enter your message..."
-                    />
+                    ></textarea>
                     <button id="chatEmojiButton" class="hidden">
                         <i class="fas fa-smile"></i>
                     </button>