Fixing necro speed

[Trepidation Lost.3469]

There are traits which enable faster movement in shroud however you need to maintain life force for fights, it would be a good idea if life force didn't drain outside of combat so you can enter the shroud and use the passive move speed to get around, this would really help in places like wvw where you're slow as sin and have to swap out signet of locust everytime u see enemies