message: Move CallViewHeader css to separate file
diff: @import "./views/voip/_CallView.scss";
  @import "./views/voip/_CallViewForRoom.scss";
  @import "./views/voip/_CallViewSidebar.scss";
  +@import "./views/voip/_CallViewHeader.scss";
  @import "./views/voip/_DialPad.scss";
  @import "./views/voip/_DialPadContextMenu.scss";
  @import "./views/voip/_DialPadModal.scss";
  