Fix epub viewer styling

reader/templates/reader/book_read/epub_viewer.html

@@ -19,7 +19,7 @@
                         <span class="ta-text">Now reading: {{ book.title }}</span>
                     </td>
                     <td>
-                        <span id="lastsaved">Not saved yet.</span>
+                        <span class="ta-text" id="lastsaved"></span>
                     </td>
                     <td class="ta-right">
                         <span class="ta-text"><a href="{% url 'view_book' book.id %}" class="btn btn-primary">Back to book</a></span>