Simple interface improvement: Apportation targeting

[tedric]

...should work more like spell/ranged targeting. If it fails, or if the object you last cast it on is still in LOS, that object should be the default target of the next cast. It's a spell that's plenty useful even at abysmal failure rates, so on lots of characters I get really annoyed when I try to apport that one thing out of a battlefield of corpses and loot, and have to keep mashing buttons to put the target on it -- only to miscast for the seventh time.

Please fix, thanks!