Optimize automatic navmesh rebuild in editor for navmesh relevant actors only

Source/Editor/SceneGraph/Actors/ColliderNode.cs

@@ -18,6 +18,9 @@ namespace FlaxEditor.SceneGraph
         {
         }
 
+        /// <inheritdoc />
+        public override bool AffectsNavigation => true;
+
         /// <inheritdoc />
         public override bool RayCastSelf(ref RayCastData ray, out float distance, out Vector3 normal)
         {

Source/Editor/SceneGraph/Actors/NavLinkNode.cs

@@ -78,6 +78,9 @@ namespace FlaxEditor.SceneGraph.Actors
             AddChildNode(new LinkNode(this, new Guid(bytes), false));
         }
 
+        /// <inheritdoc />
+        public override bool AffectsNavigation => true;
+
         /// <inheritdoc />
         public override bool RayCastSelf(ref RayCastData ray, out float distance, out Vector3 normal)
         {

Source/Editor/SceneGraph/Actors/NavModifierVolumeNode.cs

@@ -16,5 +16,8 @@ namespace FlaxEditor.SceneGraph.Actors
         : base(actor)
         {
         }
+
+        /// <inheritdoc />
+        public override bool AffectsNavigation => true;
     }
 }

Source/Editor/SceneGraph/Actors/TerrainNode.cs

@@ -15,5 +15,8 @@ namespace FlaxEditor.SceneGraph.Actors
         : base(actor)
         {
         }
+
+        /// <inheritdoc />
+        public override bool AffectsNavigation => true;
     }
 }