Fill handle only works within bounds

[JavierM42]

Fill handle doesn't fill when mouse release happens past grid bounds:

Screen.Recording.2024-09-16.at.9.35.07.AM.mov

(https://grid.glideapps.com/)

Not sure if this is intentional behavior, but our use case would definitely benefit from it, as it would help the grid feel more natively integrated within a page.