Make combust undispelable

[Fred-2118997 (Fred)]

@Kaivax

Mage

• Fire
  • Combustion can no longer be dispelled.
    • Developers’ notes: We feel that the counterplay to Combustion, a major self-cast offensive cooldown, did not feel appropriate as it was easily dispelled. We are hoping with this change that it will prompt more creative solutions to counterplay the ability. We didn’t want to make this change previously, due to balance concerns, but now feel it is an appropriate time to bring it in line with other major cooldowns.

we won! thats, thats, (tear drop)