Fix closing a file info preview

Signed-off-by: Christoph Wurst <christoph@winzerhof-wurst.at>
Signed-off-by: nextcloud-command <nextcloud-command@users.noreply.github.com>

Author: ChristophWurst

js/viewer-main.js

@@ -257,6 +257,7 @@ export default class Viewer {
 	 */
 	close() {
 		this._state.file = ''
+		this._state.fileInfo = null
 		this._state.files = []
 		this._state.canLoop = true
 		this._state.loadMore = () => ([])