XamTileManager should raise events in 'Slide' mode when a tile is repositioned
XamTileManager should expose events to notify us when a tile is repositioned.
This is already possible when in 'Swap' mode, via the 'TileSwapped' event, but is not possible when the AllowTileDragging mode is set to 'Slide'.
I'd like the events to include the necessary arguments so I can track how tiles have moved. This was raised by another user a few years ago.