Death wish now uses it's own config instead of corpse life

[jurgyy]

Fixes #2372

Description of the problem being solved:

Death Wish targets your minions. However in PoB it uses the Enemy Corpse Life field to determine it's damage. With this PR whenever you have Death Wish a Skill Option is added in the Configuration tab with a "Death wise: Minion Life" field. This is practically identical to the way Dark Pact configures it's damage.

Steps taken to verify a working solution:

• Equip "Maw of Mischief" unique helmet
• Select "Death Wish" as main skill
• Select "Minion Explosion" as skillPart
• Go to Configuration tab
• increase the newly added "Minion Life" field.
• Check if the skill's damage increases.

Link to a build that showcases this PR:

https://pastebin.com/ksuBneXA

Before screenshot:

After screenshot:

[orlp]

I think it would be even better if the skill had a minion selector option from your minions, and used that minion's life. That way minion life nodes on the tree would also correctly indicate their DPS increase instead of having to manually enter the new life value and comparing.

[jurgyy]

@orlp, yeah, I was looking into that, but since I'm new I don't know enough to implement that. If someone can point me in the right direction I would love to do it though!