Overlay shader cleanup (#3112)

Robust.Client/GameObjects/EntitySystems/DebugEntityLookupSystem.cs

@@ -5,6 +5,7 @@ using Robust.Shared.Containers;
 using Robust.Shared.Enums;
 using Robust.Shared.GameObjects;
 using Robust.Shared.IoC;
+using Robust.Shared.Maths;
 using Robust.Shared.Utility;
 using Color = Robust.Shared.Maths.Color;
 
@@ -75,7 +76,6 @@ public sealed class EntityLookupOverlay : Overlay
 
             worldHandle.SetTransform(matrix);
 
-
             var lookupAABB = invMatrix.TransformBox(args.WorldBounds);
             var ents = new List<EntityUid>();
 
@@ -101,5 +101,7 @@ public sealed class EntityLookupOverlay : Overlay
                 worldHandle.DrawRect(aabb, Color.Blue.WithAlpha(0.2f));
             }
         }
+
+        worldHandle.SetTransform(Matrix3.Identity);
     }
 }

Robust.Client/GameObjects/EntitySystems/GridChunkBoundsDebugSystem.cs

@@ -102,6 +102,8 @@ namespace Robust.Client.GameObjects
                     }
                 }
             }
+
+            worldHandle.SetTransform(Matrix3.Identity);
         }
     }
 }

Robust.Client/Physics/GridFixtureSystem.cs

@@ -118,6 +118,8 @@ namespace Robust.Client.Physics
                         worldHandle.DrawLine(start, end, Color.Aquamarine);
                     }
                 }
+
+                worldHandle.SetTransform(Matrix3.Identity);
             }
 
             private Color GetColor(MapChunk chunk, int index)

Robust.Client/Placement/PlacementManager.cs

@@ -626,6 +626,7 @@ namespace Robust.Client.Placement
                 {
                     handle.UseShader(_drawingShader);
                     handle.DrawRect(EraserRect.Value, new Color(255, 0, 0, 50));
+                    handle.UseShader(null);
                 }
                 return;
             }