Fix filling out drawcall timings if 'hide empty' option is enabled
Fix filling out drawcall timings if 'hide empty' option is enabled

* Previously we'd expect to run through the same algorithm to generate
  the drawcall nodes, but fill in the existing nodes. However this
  completely broke down when some nodes weren't created because they
  were empty. Now instead we just iterate the nodes that are there and
  look up any values in the timing results.

TurtleRockStudios/renderdoc_public,Yours3lf/renderdoc,michaelrgb/renderdoc,moradin/renderdoc,adrianbu/renderdoc,Zorro666/renderdoc,cgmb/renderdoc,googlestadia/renderdoc,victor-moya/renderdoc,moradin/renderdoc,googlestadia/renderdoc,victor-moya/renderdoc,etnlGD/renderdoc,cgmb/renderdoc,Anteru/renderdoc,Velro/renderdoc,googlestadia/renderdoc,TurtleRockStudios/renderdoc_public,Velro/renderdoc,michaelrgb/renderdoc,etnlGD/renderdoc,googlestadia/renderdoc,Yours3lf/renderdoc,Anteru/renderdoc,baldurk/renderdoc,TurtleRockStudios/renderdoc_public,Zorro666/renderdoc,baldurk/renderdoc,googlestadia/renderdoc,adrianbu/renderdoc,Yours3lf/renderdoc,googlestadia/renderdoc,cgmb/renderdoc,moradin/renderdoc,Zorro666/renderdoc,michaelrgb/renderdoc,Lssikkes/renderdoc,Velro/renderdoc,etnlGD/renderdoc,Anteru/renderdoc,TurtleRockStudios/renderdoc_public,Lssikkes/renderdoc,Velro/renderdoc,Lssikkes/renderdoc,michaelrgb/renderdoc,Velro/renderdoc,Anteru/renderdoc,baldurk/renderdoc,etnlGD/renderdoc,michaelrgb/renderdoc,Anteru/renderdoc,Zorro666/renderdoc,Zorro666/renderdoc,baldurk/renderdoc,Lssikkes/renderdoc,Yours3lf/renderdoc,TurtleRockStudios/renderdoc_public,TurtleRockStudios/renderdoc_public,Yours3lf/renderdoc,etnlGD/renderdoc,victor-moya/renderdoc,Lssikkes/renderdoc,adrianbu/renderdoc,moradin/renderdoc,cgmb/renderdoc,Anteru/renderdoc,baldurk/renderdoc,baldurk/renderdoc,Zorro666/renderdoc,moradin/renderdoc,etnlGD/renderdoc,adrianbu/renderdoc,Anteru/renderdoc,victor-moya/renderdoc,adrianbu/renderdoc,victor-moya/renderdoc,adrianbu/renderdoc,moradin/renderdoc,Lssikkes/renderdoc,victor-moya/renderdoc,Velro/renderdoc,Yours3lf/renderdoc,cgmb/renderdoc