group tiles by category

OpenRA.Editor/Form1.cs

@@ -144,7 +144,12 @@ namespace OpenRA.Editor
 			// construct the palette of tiles
 			var palettes = new[] { tilePalette, actorPalette, resourcePalette };
 			foreach (var p in palettes) { p.Visible = false; p.SuspendLayout(); }
-			foreach (var t in tileset.Templates)
+
+			foreach (var tc in tileset.Templates.GroupBy(t => t.Value.Category))
+			{
+				var category = tc.Key ?? "(Uncategorized)";
+
+				foreach( var t in tc )
 				{
 					try
 					{
@@ -171,6 +176,7 @@ namespace OpenRA.Editor
 					}
 					catch { }
 				}
+			}
 
 			var actorTemplates = new List<ActorTemplate>();