DynamicPicker: Reset idle timeout on refresh

If the new results shown by the picker select a file that hasn't been
previewed before, the idle timeout would not trigger highlighting on
that file. With this change, we reset the idle timeout and allow that
file to be highlighted on the next idle timeout event.

helix-term/src/ui/picker.rs

@@ -798,7 +798,7 @@ impl<T: Item + Send + 'static> Component for DynamicPicker<T> {
         cx.jobs.callback(async move {
             let new_options = new_options.await?;
             let callback =
-                crate::job::Callback::EditorCompositor(Box::new(move |_editor, compositor| {
+                crate::job::Callback::EditorCompositor(Box::new(move |editor, compositor| {
                     // Wrapping of pickers in overlay is done outside the picker code,
                     // so this is fragile and will break if wrapped in some other widget.
                     let picker = match compositor.find_id::<Overlay<DynamicPicker<T>>>(Self::ID) {
@@ -808,6 +808,7 @@ impl<T: Item + Send + 'static> Component for DynamicPicker<T> {
                     picker.options = new_options;
                     picker.cursor = 0;
                     picker.force_score();
+                    editor.reset_idle_timer();
                 }));
             anyhow::Ok(callback)
         });