Correct selector and change order

Original selector was stupidly incorrect. Also, as we're now inserting *after*, need to reverse the order in which we insert these, otherwise the modal will come before the button, which messes up scripting later to close it

app.js

@@ -52,10 +52,10 @@ function initializeExtension() {
     // classic structure
     $(kaminoButton).insertBefore($('.sidebar-assignee'))
     $(modal).insertBefore($('.sidebar-assignee'))
-  } else if ($('.issue-viewer-metadata-pane > h2').length) {
+  } else if ($('[data-testid="issue-viewer-metadata-pane"] > h2').length) {
     // new issue/PR experience
-    $(kaminoButton).insertAfter($('.issue-viewer-metadata-pane > h2'))
-    $(modal).insertAfter($('.issue-viewer-metadata-pane > h2'))
+    $(modal).insertAfter($('[data-testid="issue-viewer-metadata-pane"] > h2'))
+    $(kaminoButton).insertAfter($('[data-testid="issue-viewer-metadata-pane"] > h2'))
   }
 
   const kaminoButtonExists = $('.kaminoButton').length > 0