lib-nested-tty: reactivate list-cursor widget via new TreeNavExt trait

lib-nested-tty/src/edit_tree/cursor_widget.rs

@@ -1,5 +1,27 @@
+use {
+    r3vi::{
+        view::{
+            OuterViewPort
+        },
+        buffer::vec::*,
+        projection::decorate_sequence::Separate
+    },
+    nested::{
+        edit_tree::{
+            TreeNav
+        },
+        editors::list::{
+            ListCursorMode
+        }
+    },
+    crate::{TerminalView, make_label, TerminalProjections}
+};
 
-impl TreeNav {
+pub trait TreeNavExt {
+    fn get_cursor_widget(&self) -> OuterViewPort<dyn TerminalView>;
+}
+
+impl<T: TreeNav> TreeNavExt for T {
     fn get_cursor_widget(&self) -> OuterViewPort<dyn TerminalView> {
         VecBuffer::with_data(
             vec![
@@ -30,4 +52,3 @@ impl TreeNav {
             .flatten()
     }
 }
-

lib-nested-tty/src/edit_tree/mod.rs

@@ -1,4 +1,4 @@
 
 pub mod color;
 pub mod keymap;
-
+pub mod cursor_widget;