fix(files_sharing): Show note if note exists on share

When a share includes a note, ensure the note checkbox is checked and the note is
displayed when reopening the share sidebar.

Fixes: #52794.

Signed-off-by: nfebe <fenn25.fn@gmail.com>

apps/files_sharing/src/views/SharingDetailsTab.vue

@@ -905,8 +905,9 @@ export default {
 				this.advancedSectionAccordionExpanded = true
 			}
 
-			if (this.share.note) {
+			if (this.isValidShareAttribute(this.share.note)) {
 				this.writeNoteToRecipientIsChecked = true
+				this.advancedSectionAccordionExpanded = true
 			}
 
 		},