[z1945] Improve SCRIPT_COMMAND_MOVE_TO

This changes the handling of SCRIPT_COMMAND_MOVE_TO, to not expect some travel-time, but directly provide the speed for the movement (*100).

Attention to DB-Devs, please check your MOVE_TO scripts.

Signed-off-by: Schmoozerd <schmoozerd@scriptdev2.com>

(cleaned version of 6dca2e4)

(based on commit [s1533] - 0b06c58)