feat(spawners): Adds Respawn, EditSpawner, and SpawnProps commands (#532)

- [X] Adds `Respawn` command
- [X] Adds `EditSpawner` command
  - Usage: `[global editspawner <type> <arguments> set <properties>`
  - This command replaces the arguments (optional) and properties of the affected spawners for that type
- [X] Adds `SpawnProps` command
  - Usage: `[area spawnprops`
  - This command brings up a gump to modify targeted spawners based on the targeted entity.
  - To do this, the props/values are copied and then used to construct a properties list for the spawner entry.

Closes #531

Projects/UOContent/Gumps/Props/PropsConfig.cs

@@ -38,5 +38,6 @@ namespace Server.Gumps
 
         public static readonly int EntryHeight = 20;
         public static readonly int BorderSize = 10;
+        public static readonly int ApplySize = 30;
     }
 }