fix: Fixes spell mechanics and misc bugs (#1118)

- [X] Fixes NPE from account tags.
- [X] Fixes bad skill check due to missing cast to double.
- [X] Fixes water elemental duration.
- [X] Standardizes spell summon duration by expansion.

Projects/UOContent/Items/New Haven Quest Rewards/HammerOfHephaestus.cs

@@ -33,8 +33,8 @@ namespace Server.Items
 
         public override void OnDoubleClick(Mobile from)
         {
-            if (!IsChildOf(from.Backpack) && Parent != from
-            )                                       // TODO: These checks don't match EA, but they match BaseTool for now
+            // TODO: These checks don't match EA, but they match BaseTool for now
+            if (!IsChildOf(from.Backpack) && Parent != from)
             {
                 from.SendLocalizedMessage(1042001); // That must be in your pack for you to use it.
             }

Projects/UOContent/Items/Weapons/Abilities/ForceArrow.cs

@@ -61,7 +61,7 @@ namespace Server.Items
             }
             else
             {
-                _table.Add(attacker, new List<ForceArrowInfo>() { info });
+                _table.Add(attacker, new List<ForceArrowInfo> { info });
             }
 
             BuffInfo.AddBuff(defender, new BuffInfo(BuffIcon.ForceArrow, 1151285, 1151286, info.DefenseChanceMalus.ToString()));

Projects/UOContent/Items/Weapons/Abilities/WeaponAbilityPackets.cs

@@ -11,7 +11,7 @@ namespace Server.Items
             IncomingPackets.RegisterEncoded(0x19, true, &SetAbility);
         }
 
-        public static unsafe void SetAbility(NetState state, IEntity e, EncodedReader reader)
+        public static void SetAbility(NetState state, IEntity e, EncodedReader reader)
         {
             var m = state.Mobile;
             var index = reader.ReadInt32();