Make sure the fast-forwarding logic is the same as in the game

[DCNick3]

At least this should change:

• The message is skipped "atomically", not 1 ClickWait per frame (how does the message synchronization work there?)
• Tweens used by LAYERWAIT are fast-forwarded (except when a special flag is set in the LAYERCTRL)
• ???

[DCNick3]

The message is also layouted differently when the FF is active (it forces the text to appear instantly)