add raid mark filter and fix casting on unmarked units

commands.lua

@@ -131,7 +131,7 @@ end
 
 local function pickTarget(selectedPriority, spellNameNoRank, checkRange)
 	-- Curse the target that best matches the selected priority
-	local highestPriorityValue = 0
+	local highestPriorityValue = -1
 	local targetedGuid = nil
 
 	local _, currentTargetGuid = UnitExists("target")

filter.lua

@@ -86,5 +86,9 @@ function Cursive:ShouldDisplayGuid(guid)
 		shouldDisplay = shouldDisplay and filter.range(guid)
 	end
 
+	if Cursive.db.profile.filterraidmark then
+		shouldDisplay = shouldDisplay and filter.range(guid)
+	end
+
 	return shouldDisplay
 end

settings.lua

@@ -28,6 +28,7 @@ Cursive:RegisterDefaults("profile", {
 	filterhostile = true,
 	filterattackable = true,
 	filterrange = false,
+	filterraidmark = false,
 })
 
 local barOptions = {
@@ -208,6 +209,18 @@ local mobFilters = {
 			Cursive.db.profile.filterrange = v
 		end,
 	},
+	["raidmark"] = {
+		type = "toggle",
+		name = "Has Raid Mark",
+		desc = "Has Raid Mark",
+		order = 5,
+		get = function()
+			return Cursive.db.profile.filterraidmark
+		end,
+		set = function(v)
+			Cursive.db.profile.filterraidmark = v
+		end,
+	},
 }
 
 Cursive.cmdtable = {