fix: Fixes travel restriction messages (#1263)

- [X] `BaseRegion.CheckTravel` now properly cascades through parent regions
- [X] `SpellHelper.CheckTravel` now returns a failure message instead of sending one internally.
- [X] Consolidates travel restriction messages so they aren't duplicated.

Projects/UOContent/Spells/Sixth/Mark.cs

@@ -35,8 +35,9 @@ namespace Server.Spells.Sixth
                     Caster.Name
                 );
             }
-            else if (!SpellHelper.CheckTravel(Caster, TravelCheckType.Mark))
+            else if (!SpellHelper.CheckTravel(Caster, TravelCheckType.Mark, out var failureMessage))
             {
+                failureMessage.SendMessageTo(Caster);
             }
             else if (SpellHelper.CheckMulti(Caster.Location, Caster.Map, !Core.AOS))
             {
@@ -63,6 +64,20 @@ namespace Server.Spells.Sixth
             Caster.Target = new SpellTargetItem(this, range: Core.ML ? 10 : 12);
         }
 
-        public override bool CheckCast() => base.CheckCast() && SpellHelper.CheckTravel(Caster, TravelCheckType.Mark);
+        public override bool CheckCast()
+        {
+            if (base.CheckCast())
+            {
+                return true;
+            }
+
+            if (!SpellHelper.CheckTravel(Caster, TravelCheckType.Mark, out var failureMessage))
+            {
+                failureMessage.SendMessageTo(Caster);
+                return false;
+            }
+
+            return true;
+        }
     }
 }