Various animation/power bugs

These have seeped in over the last few issues.

Hoarfrost (tank at min) roots for a very brief duration.
Dull pain roots for a very brief duration.
Shadowfall roots for a very brief duration.

Targeting drone (Blaster at min.) has had its animation changed, and roots for most of the cast duration.

Scrapper burn damages the caster, not 100% of the time.

Well I can verify the burn bug. My lvl 36 spines/fire scrapper just starting burning herself today. I was running around Talos burn patching freaks and warriors for tip missions and it just started hitting me. It's especially bad if you hit build up and firery embrace. Ouch.