As requested by wraitii, acceleration as an alternative to D2767 and D2837. Adding accelerations on every move. This fixes dancing much worse than D2837, the gameplay impact is much bigger by the looks of it, since one needs rather low accelerations even remotely stop dancing. Also chasing is beyond broken (can be fixed by a similar trick as D2767 and D2837, by not accelerating on all moves).
Note this can easily be combined with D2913, but not so easily with D2837 (see the code stopping the unit on big turns in this patch)