Show the variables pane even when it is empty.

The widget layout shouldn't change when there are no variables.

Change-Id: Iedb48642486944127fa800072c1f4c57a574b513
Bug: skia:12666
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/484836
Reviewed-by: Brian Osman <brianosman@google.com>
Auto-Submit: John Stiles <johnstiles@google.com>
Commit-Queue: John Stiles <johnstiles@google.com>
1 file changed