help: Updated annotation navigation page

Removed annotation date from annotation-navigation.page and updated annotations-nav-to-page.png.

Fixes #1345

help/C/annotations-navigate.page

@@ -20,7 +20,7 @@
 
  <title>Annotation navigation</title>
    <p>
-     If you have created annotations on your document, you can use the side pane to display the list of all the annotations in the document. The list indicates the type, page number, author and date of the annotation.
+     If you have created annotations on your document, you can use the side pane to display the list of all the annotations in the document. The list indicates the type, page number and author of the annotation.
    </p>
    <p>
    To quickly navigate to the location of a particular annotation, click on the arrow to the left of the page number. You will see a list of annotations on that page.  Click on the annotation you are interested in, and the <app>document viewer</app> will navigate to the location of the annotation in the document.