Make drag & drop of floating tiles less janky

This fixes an issue where upon dragging a floating tile to a different corner of the interface, it would briefly move toward its original position before jerking back in the intended direction.

src/grid/Grid.tsx

@@ -198,6 +198,10 @@ interface Drag {
    * The Y coordinate of the dragged tile, as a scalar of the grid height.
    */
   yRatio: number;
+  /**
+   * Whether this event ends the drag gesture.
+   */
+  endOfGesture: boolean
 }
 
 export type DragCallback = (drag: Drag) => void;
@@ -464,12 +468,12 @@ export function Grid<
       )
       .catch(logger.error);
 
-    if (endOfGesture)
     callback({
       x: tileX,
       y: tileY,
       xRatio: tileX / (gridBounds.width - tile.width),
       yRatio: tileY / (gridBounds.height - tile.height),
+      endOfGesture,
     });
   };