Improve range display on group tree nodes in EventBrowser.
Improve range display on group tree nodes in EventBrowser.

In the event browser, the tree nodes which can be expanded are always
showing a range (17-17) even if the range is a single item. This fix
changes that to 17.

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