[mirotalksfu] - improve widget

widgets/example-1.html

@@ -15,6 +15,7 @@
             data-position="bottom-right"
             data-check-online="false"
             data-expert-images="https://i.pravatar.cc/40?img=1,https://i.pravatar.cc/40?img=2,https://i.pravatar.cc/40?img=3"
+            data-buttons="audio,video,screen,chat,join"
             data-heading="Need Help?"
             data-subheading="Get instant support from our expert team!"
             data-connect-text="connect in < 5 seconds"