Profile Viewer doesn't update with subset

[keflavich]

Describe the bug
Creating a profile viewer then selecting a subset in the 2D viewer does not make the subset appear in the profile viewer

To Reproduce

from glue.app.qt.application import GlueApplication
from glue.core import DataCollection

dc = DataCollection()
app = GlueApplication(dc)

from glue_astronomy.translators import spectral_cube

from glue.app.qt.application import GlueApplication

from spectral_cube.spectral_cube import SpectralCube, BaseSpectralCube

cube = SpectralCube.read('/orange/adamginsburg/ALMAIMF_Images/G327.29/B6/linecubes_12m/G327.29_B6_spw1_12M_sio.image.pbcor', format='casa_image')

dc['g327sio'] = cube

data = dc[0]

cube2 = data.get_object(cls=SpectralCube)

Expected behavior
Red spectrum should appear

Screenshots

Details:
see screenshot

Additional context
I tried to make this a MWE script but got stymied when I hit glue-viz/glue-astronomy#55. I was able to save the session here, sort of: #2245