BUG: IndexError crashes app

[prjemian]

When browsing the ht_hedm catalog, selecting scan_id=1258 (2024-01-22 17:19:57) crashes the application with this exception report:

  File "/home/beams1/JEMIAN/Documents/projects/BCDA-APS/gemviz/gemviz/bluesky_runs_catalog.py", line 135, in doRunSelectedSlot
    self.brc_run_viz.setData(self.getDataDescription(run))
                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/beams1/JEMIAN/Documents/projects/BCDA-APS/gemviz/gemviz/bluesky_runs_catalog.py", line 155, in getDataDescription
    analysis = run.plottable_signals()
               ^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/beams1/JEMIAN/Documents/projects/BCDA-APS/gemviz/gemviz/tapi.py", line 119, in plottable_signals
    axes = [get_signal(d[0][0]) for d in run_dims]
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/beams1/JEMIAN/Documents/projects/BCDA-APS/gemviz/gemviz/tapi.py", line 119, in <listcomp>
    axes = [get_signal(d[0][0]) for d in run_dims]
                       ~~~~^^^
IndexError: list index out of range

version: 0.0.2.dev146+g13607a0