Hidden tiles (#5102)

* hidden tiles

* Update TileSpawningUIController.cs

* Update TileSpawningUIController.cs

* Update ITileDefinition.cs

* Update TileSpawningUIController.cs

* Move EditorHidden where clause out

* Make EditorHidden a DIM

So there's no breaking change

* Release notes.

---------

Co-authored-by: Pieter-Jan Briers <pieterjan.briers+git@gmail.com>

RELEASE-NOTES.md

@@ -39,7 +39,7 @@ END TEMPLATE-->
 
 ### New features
 
-*None yet*
+* `ITileDefinition.EditorHidden` allows hiding a tile from the tile spawn panel.
 
 ### Bugfixes
 

Robust.Client/UserInterface/Controllers/Implementations/TileSpawningUIController.cs

@@ -130,7 +130,7 @@ public sealed class TileSpawningUIController : UIController
 
         _window.TileList.Clear();
 
-        IEnumerable<ITileDefinition> tileDefs = _tiles;
+        IEnumerable<ITileDefinition> tileDefs = _tiles.Where(def => !def.EditorHidden);
 
         if (!string.IsNullOrEmpty(searchStr))
         {

Robust.Shared/Map/ITileDefinition.cs

@@ -55,5 +55,10 @@ namespace Robust.Shared.Map
         /// </summary>
         /// <param name="id">The new tile ID for this tile definition.</param>
         void AssignTileId(ushort id);
+
+        /// <summary>
+        ///     Allows you to hide tiles from the tile spawn menu.
+        /// </summary>
+        bool EditorHidden => false;
     }
 }