Dashboard can end up in a reorder loop

[tomivirkki]

Description

If Dashboard is configured in a certain way, it's possible for it to end up in a reorder loop while drag-reordering widgets

Kapture.2024-11-26.at.09.58.54.mp4

This can be fixed by resetting the cached drag coordinates when a reorder occurs on drag reorder

Expected outcome

There should not be a loop

Minimal reproducible example

Use the repro from #7950

Steps to reproduce

Drag Panel 3 at the bottom of Panel 1

Environment

Vaadin version(s): 24.6

Browsers

Issue is not browser related