Fix a notice associated with new test link in SearchSource, a=chris

diff --git a/src/views/elements/SearchsourcesElement.php b/src/views/elements/SearchsourcesElement.php
index 939f63e88..95915df52 100644
--- a/src/views/elements/SearchsourcesElement.php
+++ b/src/views/elements/SearchsourcesElement.php
@@ -749,10 +749,13 @@ class SearchsourcesElement extends Element
                 e("id='focus-button'");
             }?>
             type="submit"><?=tl('searchsources_element_save')
-            ?></button> <a class='source-anchor-button' href="<?=
+            ?></button><?php
+            if ($data['SOURCE_FORM_TYPE'] == 'editsource') {?>
+                <a class='source-anchor-button' href="<?=
                 $base_url . "&amp;arg=testsource&amp;ts=".
                 $data['ts'] . $paging1 . $paging2?>"><?=
-                tl('searchsources_element_test')?></a></td></tr>
+                tl('searchsources_element_test')?></a><?php
+            }?></td></tr>
         </table>
         </form><?php
     }