[mirotalksfu] - add color

public/css/Room.css

@@ -1157,6 +1157,10 @@ button:hover {
     color: red !important;
 }
 
+.yellow {
+    color: yellow !important;
+}
+
 .green {
     color: rgb(0, 255, 71) !important;
 }

public/views/Room.html

@@ -277,7 +277,7 @@ access to use this app.
                             <p>Lock room</p>
                         </button>
                         <button id="unlockRoomButton" class="hidden btn-custom">
-                            <i class="fas fa-lock"></i>
+                            <i class="fas fa-lock yellow"></i>
                             <p>Unlock room</p>
                         </button>
                         <button id="sendEmailInvitation" class="hidden btn-custom">