Implement basic cursor availability

widget/src/pane_grid/draggable.rs

@@ -4,9 +4,5 @@ use crate::core::{Layout, Point};
 pub trait Draggable {
     /// Returns whether the [`Draggable`] with the given [`Layout`] can be picked
     /// at the provided cursor position.
-    fn can_be_dragged_at(
-        &self,
-        layout: Layout<'_>,
-        cursor_position: Point,
-    ) -> bool;
+    fn can_be_dragged_at(&self, layout: Layout<'_>, cursor: Point) -> bool;
 }