Merge pull request #2793 from nextcloud/backport/2789/stable31

[stable31] fix: Do not update page title for single file public shares

Author: juliusknorr

css/main-Cy9Pa_3_.chunk.css renamed to css/main-tIlk5kmC.chunk.css

@@ -1,3 +1,3 @@
 /* extracted by css-entry-points-plugin */
-@import './main-Cy9Pa_3_.chunk.css';
+@import './main-tIlk5kmC.chunk.css';
 @import './logger-60RCWKf0.chunk.css';

css/viewer-main.css

@@ -628,7 +628,7 @@ export default defineComponent({
 
 			// swap title with original one
 			const title = document.getElementsByTagName('head')[0].getElementsByTagName('title')[0]
-			if (title && !title.dataset.old) {
+			if (title && !title.dataset.old && fileName !== '') {
 				title.dataset.old = document.title
 				this.updateTitle(fileName)
 			}