Escort talents retroactively apply their requirement check

[Ploppy]

I got heightened senses from an escort, then put one point into trap handling to see how that talent worked. When I wanted to unspec trap handling again, I couldn't do so, because heightened senses had it as a prerequisite. Since I also can't remove the generics point from heightened senses, I've effectively wasted that point until I want another talent with trap handling as a prereq.