Incorportate changes to remie: edition screen headers and button for tag addition for CurrentSegmentInfobox + corresponding style, and fix try for Jquery-ui/lab.js bug

// WebKit-style focus

.tab-focus() {
  // Default
  outline: thin dotted;
  // WebKit
  outline: 5px auto -webkit-focus-ring-color;
  outline-offset: -2px;
}