Add a lint tag and documentation.

OpenRA.Mods.Common/Traits/Render/WithGateSpriteBody.cs

@@ -18,6 +18,7 @@ using OpenRA.Traits;
 
 namespace OpenRA.Mods.Common.Traits.Render
 {
+	[Desc("This actor visually connects to walls and changes appearance when actors walk through it.")]
 	class WithGateSpriteBodyInfo : WithSpriteBodyInfo, IWallConnectorInfo, Requires<GateInfo>
 	{
 		[Desc("Cells (outside the gate footprint) that contain wall cells that can connect to the gate")]
@@ -26,6 +27,7 @@ namespace OpenRA.Mods.Common.Traits.Render
 		[Desc("Wall type for connections")]
 		public readonly string Type = "wall";
 
+		[SequenceReference]
 		[Desc("Override sequence to use when fully open.")]
 		public readonly string OpenSequence = null;