Handle assigning monologues

Unfortunatly we don't start the dialog properly any more
We also panic if no trees are avaliable...

src/bin/trees/main.rs

@@ -600,6 +600,7 @@ fn spawn_debug_buttons(
                         MonologuesList,
                         BackgroundColor(PINK.into()),
                     ))
+                    .observe(assign_monologue_event)
                     .observe(preview_monologue)
                     .observe(toggle_debug_button_color_over)
                     .observe(toggle_debug_button_color_out);
@@ -862,3 +863,12 @@ fn spawn_tree(
 ) {
     events.write(PlantTree);
 }
+
+fn assign_monologue_event(
+    trigger: Trigger<Pointer<Click>>,
+    mut events: EventWriter<AssignMonologue>,
+    monologues: Query<&TreeMonologue>,
+) {
+    let TreeMonologue(handle) = monologues.get(trigger.target()).unwrap();
+    events.write(AssignMonologue(handle.clone()));
+}