DragTargetDrop does not fire when dragged item is under cursor.

[Its-treason]

When dragging an item, the DragTargetDrop does not fire when the preview of the dragged item is under the cursor.

I've built this fix for me locally, but I'm not sure if this is too much of a hack.

diff --git a/src/event/dispatch.rs b/src/event/dispatch.rs
index 243c999..e5f5b35 100644
--- a/src/event/dispatch.rs
+++ b/src/event/dispatch.rs
@@ -1109,13 +1109,24 @@ impl RouteCx<'_, '_> {
                 self.gcx.window_state.needs_box_tree_commit = true;
                 self.dispatch_drag_event(drag_dispatch);
             }
-            if let Some(_active) = &self.gcx.window_state.drag_tracker.active_drag {
+            if let Some(active) = &self.gcx.window_state.drag_tracker.active_drag {
                 self.gcx.window_state.needs_box_tree_from_layout = true;
                 let hover_path = self
                     .hit_path
                     .as_ref()
                     .map(|p| p.iter().as_slice())
                     .unwrap_or(&[]);
+                // Exclude the dragged element and its descendants from the
+                // hover path so the drag preview does not intercept drop-target
+                // hit-testing.
+                let dragged_id = active.element_id;
+                let hover_path = match hover_path
+                    .iter()
+                    .position(|id| *id == dragged_id)
+                {
+                    Some(idx) => &hover_path[..idx],
+                    None => hover_path,
+                };
                 let drag_events = self
                     .gcx
                     .window_state