Blender Git Loki

Fix T83177: Industry Compatible keymap: MMB-dragging to transform engages axis-constraining on release

With rBc0677b662f4b, we try to track all modal events in order to detect the
one corresponding to the release.

But modifier keys can mask the modal event and thus confirm realease ends up
being skipped.

This resulted in the T83387.

With this commit we now read the actual key drop value in the modal event.

This fixes T83387