Tests: a torn-off strip or a new toolbar leaves the palette windows shown

The hidden-toolbar test now expects exactly one show command when the
flyout stops drawing, and the comment at palette_window_levels names
the All Tools drawer.

crates/ui-egui/src/panel_docking.rs

@@ -1136,7 +1136,8 @@ pub(crate) fn show(app: &mut VectorcraftApp, ui: &mut egui::Ui) {
     }
     let modal = modal_open(app, &ctx);
     // Palette windows are OS windows of their own, held above the app's window while it is active,
-    // so a dialog, a menu or a tool flyout drawn in the main window would be covered by them.
+    // so a dialog, a menu, a tool flyout or the All Tools drawer drawn in the main window would be
+    // covered by them.
     #[cfg(not(target_arch = "wasm32"))]
     palette_window_levels(&ctx, &layout, modal, egui::Popup::is_any_open(&ctx) || crate::menus::menu_open(&ctx) || crate::toolbar::flyout_open(&ctx));
     let mut blocked = Vec::new();

crates/ui-egui/src/panel_docking/native_tests.rs

@@ -750,7 +750,25 @@ fn a_flyout_or_drawer_of_a_hidden_toolbar_leaves_the_palette_windows_shown() {
     h.app.run("window.panels", json!({})).unwrap();
     h.frames(1);
     assert!(!h.app.ui.toolbar && h.app.ui.flyout.is_some(), "the flyout is left set with the Tools panel hidden");
-    assert_eq!(take_palette_commands(&h, viewport).0.last(), Some(&true), "shown again: the flyout does not draw");
+    assert_eq!(take_palette_commands(&h, viewport).0, [true], "shown again: the flyout does not draw");
+}
+
+/// A strip torn off a flyout and a toolbar made with New Toolbar stay on screen like panels, so the
+/// palette windows stay shown beside them.
+#[test]
+fn a_torn_off_strip_or_a_new_toolbar_leaves_the_palette_windows_shown() {
+    let mut h = Harness::new();
+    let viewport = h.float("navigator");
+    h.host.borrow_mut().focus = ViewportId::ROOT;
+    h.frames(2);
+    take_palette_commands(&h, viewport);
+    h.app.run("window.floatTools", json!({"tool": "pen"})).unwrap();
+    h.app.run("window.toolbar.new", json!({"name": "Mine"})).unwrap();
+    h.frames(2);
+    assert!(!h.app.ui.floating_flyouts.is_empty(), "the strip floats");
+    assert!(h.app.ui.custom_toolbars.iter().any(|b| b.shown), "the new toolbar shows");
+    assert_eq!(h.app.ui.flyout, None, "no flyout is open");
+    assert_eq!(take_palette_commands(&h, viewport), (vec![], vec![]), "the palette windows are left as they were");
 }
 
 /// The frame in which a click elsewhere closes a flyout or the drawer shows the palette windows, as