[mirotalksfu] - add chat/wb transparent bg

public/views/Room.html

@@ -320,6 +320,7 @@
                     <button id="whiteboardCloseBtn" class="fas fa-times"></button>
                 </div>
                 <div class="whiteboard-header-options">
+                    <button id="whiteboardGhostButton" class="fas fa-circle-half-stroke"></button>
                     <input id="wbBackgroundColorEl" class="whiteboardColorPicker" type="color" value="#000000" />
                     <input id="wbDrawingColorEl" class="whiteboardColorPicker" type="color" value="#FFFFFF" />
                     <button id="whiteboardPencilBtn" class="fas fa-pencil-alt"></button>
@@ -347,6 +348,7 @@
                 <header id="chatHeader" class="chat-header">
                     <div class="chat-header-title"><i class="fas fa-comment-alt"></i>&nbsp; Chat</div>
                     <div class="chat-header-options">
+                        <button id="chatGhostButton" class="fas fa-circle-half-stroke"></button>
                         <button id="chatSaveButton" class="fas fa-save"></button>
                         <button id="chatCleanButton" class="fas fa-trash"></button>
                         <button id="chatCloseButton" class="fas fa-times"></button>