Adding Manual connection point to allow undeclared fits

app/templates/admin/_augmented_part_attachment_points.html

@@ -31,6 +31,7 @@
         <option value="unc_thread">UNC Thread</option>
         <option value="clamp_connection">Clamp Connection</option>
         <option value="static_connection">Static Connection</option>
+        <option value="manual">Manual</option>
       </select>
     </label>
     <div id="ap-{{ augmented_part_id }}-add-connection-options"></div>