Fix incorrect use of removeSelectedAnnotation()

This function expects an ID, not an Annotation

h/static/scripts/root-thread.js

@@ -153,7 +153,9 @@ function RootThread($rootScope, annotationUI, drafts, features, searchFilter, vi
   // Remove any annotations that are deleted or unloaded
   $rootScope.$on(events.ANNOTATION_DELETED, function (event, annotation) {
     annotationUI.removeAnnotations([annotation]);
-    annotationUI.removeSelectedAnnotation(annotation);
+    if (annotation.id) {
+      annotationUI.removeSelectedAnnotation(annotation.id);
+    }
   });
   $rootScope.$on(events.ANNOTATIONS_UNLOADED, function (event, annotations) {
     annotationUI.removeAnnotations(annotations);

h/static/scripts/test/root-thread-test.js

@@ -344,7 +344,7 @@ describe('rootThread', function () {
 
     it('deselects deleted annotations', function () {
       $rootScope.$broadcast(events.ANNOTATION_DELETED, annot);
-      assert.calledWith(fakeAnnotationUI.removeSelectedAnnotation, annot);
+      assert.calledWith(fakeAnnotationUI.removeSelectedAnnotation, annot.id);
     });
 
     describe('when a new annotation is created', function () {