In OpRemoveAnnotation just drop markup for the one annotation removed

Author: Friedrich W. H. Kossebau

webodf/lib/gui/AnnotationViewManager.js

@@ -385,6 +385,7 @@ gui.AnnotationViewManager = function AnnotationViewManager(canvas, odfFragment,
             showAnnotationsPane(false);
         }
     }
+    this.forgetAnnotation = forgetAnnotation;
 
     /**
      * Untracks, unwraps, and unhighlights all annotations

webodf/lib/odf/OdfCanvas.js

@@ -1291,12 +1291,13 @@
         };
 
         /**
-         * Stops annotations and unwraps it
+         * Stops an annotation and unwraps it
+         * @param {!odf.AnnotationElement} annotation
          * @return {undefined}
          */
-        this.forgetAnnotations = function () {
+        this.forgetAnnotation = function (annotation) {
             if (annotationViewManager) {
-                annotationViewManager.forgetAnnotations();
+                annotationViewManager.forgetAnnotation(annotation);
                 fixContainerSize();
             }
         };

webodf/lib/ops/OpRemoveAnnotation.js

@@ -72,7 +72,7 @@ ops.OpRemoveAnnotation = function OpRemoveAnnotation() {
         annotationEnd = annotationNode.annotationEndElement;
 
         // Untrack and unwrap annotation
-        odtDocument.getOdfCanvas().forgetAnnotations();
+        odtDocument.getOdfCanvas().forgetAnnotation(annotationNode);
 
         /**
          * @param {!Node} node