DRACI: Saving and fading out improvments.

Fix for the: https://sourceforge.net/p/scummvm/bugs/6357/

I extend saving to keep info about id of item selected from inventory and also to remember dragon position like in game opened with DOSBox. Old saves are still compatible.

I also modified fading out to turn off after dragon is fully loaded (he was blinking and we could see loading of graphics after switching saves or going to another location).

I had to slighltly modify cursor loading to adjust it to new fading.