fix: Fixes double calls with Target cancel and spell sequences (#1840)

### Summary
- Cleans up target cancellation being called incorrectly.
- An invalid target type (which should never happen), now calls `OnTargetUntargetable` instead of `OnTargetCanceled`
- Removes double calls to `FinishSequence` in Spells.

Projects/UOContent/Spells/Fourth/Recall.cs

@@ -101,8 +101,6 @@ namespace Server.Spells.Fourth
                 Caster.MoveToWorld(loc, map);
                 Caster.PlaySound(0x1FC);
             }
-
-            FinishSequence();
         }
 
         public override void GetCastSkills(out double min, out double max)
@@ -130,6 +128,7 @@ namespace Server.Spells.Fourth
             else
             {
                 Effect(m_Entry.Location, m_Entry.Map, true);
+                FinishSequence();
             }
         }