Adjust direction of dropdowns at the bottom of the page (#4)

The bottom dropdowns on the patch page would expand downwards, requiring
the user to scroll down to see and click any of the buttons in the dropdown.
With this change these are changed into "dropup" menus, so the expand upwards.

Author: polkerty

Diff for: pgcommitfest/commitfest/templates/patch.html

@@ -183,7 +183,9 @@ <h4>Annotations</h4>
   </tbody>
 </table>
 
+<div class="dropup" >
 {%include "patch_commands.inc"%}
+</div>
 
 {%comment%}commit dialog{%endcomment%}
 <div class="modal fade" id="commitModal" role="dialog">