[mirotalksfu] - #194 add Virtual Background and Blur

public/js/Rules.js

@@ -48,6 +48,7 @@ let BUTTONS = {
         host_only_recording: true, // presenter
         pushToTalk: true,
         keyboardShortcuts: true,
+        virtualBackground: true,
     },
     producerVideo: {
         videoPictureInPicture: true,