Allow Host to call setVisibleHighlights for all Guests

src/annotator/guest.coffee

@@ -471,9 +471,7 @@ module.exports = class Guest extends Delegator
 
   # Pass true to show the highlights in the frame or false to disable.
   setVisibleHighlights: (shouldShowHighlights) ->
-    @crossframe?.call('setVisibleHighlights', shouldShowHighlights)
     this.toggleHighlightClass(shouldShowHighlights)
-    this.publish 'setVisibleHighlights', shouldShowHighlights
 
   toggleHighlightClass: (shouldShowHighlights) ->
     if shouldShowHighlights

src/annotator/host.coffee

@@ -64,3 +64,9 @@ module.exports = class Host extends Guest
   destroy: ->
     @frame.remove()
     super
+
+  setAllVisibleHighlights: (shouldShowHighlights) ->
+    @crossframe.call('setVisibleHighlights', shouldShowHighlights)
+
+    # Let the Toolbar know about this event
+    this.publish 'setVisibleHighlights', shouldShowHighlights

src/annotator/plugin/toolbar.coffee

@@ -49,7 +49,7 @@ module.exports = class Toolbar extends Plugin
           event.preventDefault()
           event.stopPropagation()
           state = not @annotator.visibleHighlights
-          @annotator.setVisibleHighlights state
+          @annotator.setAllVisibleHighlights state
     ,
       "title": "New Page Note"
       "class": "h-icon-note"

src/sidebar/frame-sync.js

@@ -150,14 +150,17 @@ function FrameSync($rootScope, $window, Discovery, annotationUI, bridge) {
       $rootScope.$broadcast('sidebarOpened');
     });
 
-    // These merely relay calls
+    // These invoke the matching methods by name on the Guests
     bridge.on('showSidebar', function () {
       bridge.call('showSidebar');
     });
-
     bridge.on('hideSidebar', function () {
       bridge.call('hideSidebar');
     });
+    bridge.on('setVisibleHighlights', function (state) {
+      bridge.call('setVisibleHighlights', state);
+    });
+
   }
 
   /**