New sizeable window script.

window(x,y,length,height);
New script window_text and fixes.

Can make a window with text now.
window_text(x,y,length,height,message);
Fixes for previous window draw object to support this.
Update Inv and amounts added.

Can now add an amount to an inv item.
Cleaned up action wheel, no longer recreates each time.
Allows for persistent states to be kept for inv items.