fix: Open PDF file in "richdocuments" if download is hidden

Even if the PDF viewer was able to show the file when the download is
hidden, before Nextcloud 31 the custom handling for public shares of a
single file opened it in Nextcloud Office instead. For consistency with
the previous behaviour now Nextcloud Office is used again in that case.

Signed-off-by: Daniel Calviño Sánchez <danxuliu@gmail.com>

Author: danxuliu

src/views/PDFView.vue

@@ -70,11 +70,11 @@ export default {
 	},
 
 	async mounted() {
-		if (!this.isDownloadable) {
+		if (!this.isDownloadable || (this.hideDownload && this.isRichDocumentsAvailable)) {
 			this.doneLoading()
 
 			if (this.isRichDocumentsAvailable) {
-				console.info('PDF file is not downloadable, but "richdocuments" is available, so falling back to it')
+				console.info('PDF file is not downloadable or has a hidden download, but "richdocuments" is available, so falling back to it')
 
 				// Opening the viewer again overwrites its current state, so the
 				// current options need to be explicitly passed again.