fix versions icons

Signed-off-by: szaimen <szaimen@e.mail.de>
Signed-off-by: nextcloud-command <nextcloud-command@users.noreply.github.com>

apps/files_versions/src/css/versions.css

@@ -33,6 +33,10 @@
   vertical-align: top;
 }
 
+.versionsTabView .version-container img, .revertVersion img {
+	filter: var(--background-invert-if-dark);
+}
+
 .versionsTabView img {
 	cursor: pointer;
 	padding-right: 4px;