GUI: Improve "Delete" button description

dream/platform/src/dream/Input_viewDocumentManagement.html

@@ -24,7 +24,7 @@
       ui-icon-refresh ui-btn-icon-right">Run Knowledge Extraction Tool</button>
     </form>
     <form class="delete_form">
-      <button type="submit" class="ui-btn ui-btn-b ui-btn-inline ui-icon-delete ui-btn-icon-right">Delete</button>
+      <button type="submit" class="ui-btn ui-btn-b ui-btn-inline ui-icon-delete ui-btn-icon-right" title="Permanently delete this model">Delete Document</button>
     </form>
   </body>
 </html>