Merge pull request #1059 from nextcloud/fix/single-action-icons

Use modal-mask--dark selector to make icons light + add light ⬇️ dowload  icon

Author: beardhatcode

js/viewer-main.js

@@ -900,11 +900,14 @@ export default {
 }
 
 // force white icon on single buttons
-#viewer.theme--dark .action-item--single.icon-menu-sidebar,
-body.theme--dark #viewer.theme--default .action-item--single.icon-menu-sidebar {
+#viewer.modal-mask--dark .action-item--single.icon-menu-sidebar {
 	background-image: url('../assets/menu-sidebar-white.svg');
 }
 
+#viewer.modal-mask--dark .action-item--single.icon-download {
+	background-image: var(--icon-download-fff);
+}
+
 // put autocomplete over full sidebar
 // TODO: remove when new sharing sidebar (18)
 // is the min-version of viewer