Make status colors configurable

The aura based status colors can now be configured in frames.lua. This
is important in TBC where some healers don't care about e.g. magic
debuffs.

src/types/unitframe.lua

@@ -537,20 +537,10 @@ function UnitFrame:UNIT_POWER_UPDATE()
     self:UpdatePower()
 end
 
-function UnitFrame:GetRole(role)
+function UnitFrame:UpdateRole(role)
     if role == nil then
         role = UnitGroupRolesAssigned(self.unit)
     end
-
-    if GetPartyAssignment("MAINTANK", self.unit) then
-        role = "TANK"
-    end
-
-    return role
-end
-
-function UnitFrame:UpdateRole(role)
-    role = self:GetRole(role)
     if role == "HEALER" then
         self:EnablePower(Enum.PowerType.Mana)
     elseif role == "TANK" and select(3, UnitClass(self.unit)) == 6 then

src/types/unitgroup.lua

@@ -53,8 +53,8 @@ local function UnitFrameDefaultCompare(lhs, rhs)
         end
 
         -- tank < healer < damage < ?
-        local lrole = RoleValue(lhs:GetRole())
-        local rrole = RoleValue(rhs:GetRole())
+        local lrole = RoleValue(UnitGroupRolesAssigned(lunit))
+        local rrole = RoleValue(UnitGroupRolesAssigned(runit))
 
         if lrole ~= rrole then
             return lrole < rrole