Chargen cleanup.

Move common gui state pop out of if checks.
Move health update before gui state push (used as input for some windows).
Chargen fix:  Back sequence control.

Related to bug #894.
Eliminate double windows when using 'Back' from the review screen.
Force consistent back behavior (handling was changing after
a individual change button had been used).
Chargen Review Dialog: Init fix.

Load the starting Health/Magicka/Fatigue from the player stats when
creating the Review Dialog, and remove the extra copy of these stats.
In some cases, the old stat values were never updated from 0/0.