Revise Volume Imaging Ex for use of newly released `panel-neuroglancer` #856

Job	Run time
setup	38s
setup	24s
setup	12s
test / inferprojects	25s
test / inferprojects	7s
test / inferprojects	15s
test / Test projects (volumetric_imaging) / infer runner	11s
test / Test projects (volumetric_imaging) / infer runner	12s
test / Test projects (volumetric_imaging) / infer runner	19s
test / Test projects (volumetric_imaging) / test volumetric_imaging	1m 51s
test / Test projects (volumetric_imaging) / test volumetric_imaging	1m 47s
test / Test projects (volumetric_imaging) / test volumetric_imaging	1m 57s
build	0s
build	0s
build	0s
docs	0s
docs	0s
docs	0s
	8m 18s

Provide feedback