DRACI: Opening inventory during movements and actions.

Fix for the: https://sourceforge.net/p/scummvm/bugs/6404/
I was trying to get the same effect as in game opened with DOSBox.

The bug appears when we're trying to open inventory (with ' I ' key) while the dragon is moving to point/item/character - the inventory will open but dragon stops and the animation starts to soon. 

Originally it should pause the dragon movement and after closing inventory he should go to place we point before (and the animation should start after it).