fix small mistake in edge tool hitbox, do a normal trace if the trace couldn't find an edge, fixes #9833

Author: aylaylay

game/addons/tools/Code/Scene/Mesh/Tools/EdgeTool.cs

@@ -19,7 +19,17 @@ public override void OnUpdate()
 
 		var closestEdge = MeshTrace.GetClosestEdge( 8 );
 		if ( closestEdge.IsValid() )
+		{
 			Gizmo.Hitbox.TrySetHovered( closestEdge.Transform.PointToWorld( closestEdge.Line.Center ) );
+		}
+		else
+		{
+			var result = MeshTrace.Run();
+			if ( result.Hit && result.Component is MeshComponent )
+			{
+				Gizmo.Hitbox.TrySetHovered( result.EndPosition );
+			}
+		}
 
 		if ( Gizmo.IsHovered && Tool.MoveMode.AllowSceneSelection )
 		{