FreeSWITCH-FS-6836

Merge pull request #438 in FS/freeswitch from ~JMESQUITA/freeswitch:bugfix/FS-8025-overlay-icons to master

* commit 'c382c0597c1d92ef35d3c40a84c855a4e3d9b76e':
  FS-8025: [verto_communicator] Restoring the blue blackground on the video controls and making icons white again, looking better.