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/Server/World/World.cs

@@ -274,13 +274,14 @@ namespace Server
             watch.Stop();
 
             Utility.PushColor(ConsoleColor.Green);
+            Console.Write("done");
+            Utility.PopColor();
             Console.WriteLine(
-                "done ({1} items, {2} mobiles) ({0:F2} seconds)",
+                " ({1} items, {2} mobiles) ({0:F2} seconds)",
                 watch.Elapsed.TotalSeconds,
                 Items.Count,
                 Mobiles.Count
             );
-            Utility.PopColor();
 
             WorldState = WorldState.Running;
         }