Fix the Popup-trigger for `FileAttachmentAnnotationElement` (PR 15036 follow-up)
Fix the Popup-trigger for `FileAttachmentAnnotationElement` (PR 15036 follow-up)

After the changes in PR 15036, the trigger-element created in `FileAttachmentAnnotationElement.render` is now too small. This can be fixed by using the same approach as in PR 15065, and the patch can be tested using the `annotation-fileattachment.pdf` document in the test-suite.

Shoobx/pdf.js,Shoobx/pdf.js,Snuffleupagus/pdf.js,nawawi/pdf.js,nawawi/pdf.js,timvandermeij/pdf.js,timvandermeij/pdf.js,mozilla/pdf.js,showpad/mozilla-pdf.js,Snuffleupagus/pdf.js,mozilla/pdf.js,mozilla/pdf.js,timvandermeij/pdf.js,nawawi/pdf.js,showpad/mozilla-pdf.js,Snuffleupagus/pdf.js,showpad/mozilla-pdf.js,Shoobx/pdf.js