normalize context menu using @popperjs

+ normalize context children too
+ add setting to toggle context children via click or hover
+ add a select setting component
+ remove dead teleport code from sidebar tabs wrapper
+ general clean up

src/components/shared/SongItem.vue

@@ -94,7 +94,7 @@ function emitUpdate() {
   emit("playThis");
 }
 
-function showMenu(e: Event) {
+function showMenu(e: MouseEvent) {
   showContext(e, props.track, options_button_clicked);
 }
 </script>