Use PIN_FRAME_LEVEL_MAP_HIGHLIGHT for the world map lines

Wrath Classic does not have scenario blob, for some reason. This one is
present in all versions of WoW and close to the same level.

Routes.lua

@@ -1067,7 +1067,7 @@ RoutesPinMixin = CreateFromMixins(MapCanvasPinMixin)
 
 function RoutesPinMixin:OnLoad()
 	self:SetIgnoreGlobalPinScale(true)
-	self:UseFrameLevelType("PIN_FRAME_LEVEL_SCENARIO_BLOB")
+	self:UseFrameLevelType("PIN_FRAME_LEVEL_MAP_HIGHLIGHT")
 end
 
 function RoutesPinMixin:OnAcquired(battleField)