Merge pull request #1702 from MarcelP102/Pallet-placement

[UX] Pallets you can dock, group and float (including LAYERS panel)

src/modules/draw/layers/panel.rs

@@ -1,4 +1,4 @@
-// Layers panel toggle — ribbon definition.
+// Layer Manager pallet — ribbon definition.
 
 use crate::modules::{IconKind, ModuleEvent, ToolDef};
 
@@ -7,6 +7,8 @@ pub fn tool() -> ToolDef {
         id: "LAYERS",
         label: "Layers",
         icon: IconKind::Svg(include_bytes!("../../../../assets/icons/layers/panel.svg")),
-        event: ModuleEvent::ToggleLayers,
+        // A command like the Blocks palette's: it opens the pallet, and the
+        // ribbon drops the button's highlight once it has run.
+        event: ModuleEvent::Command("LAYERS".to_string()),
     }
 }