Revisit chromosome filter testing for `experimentSpec` module

[danielinteractive]

In test-experimentSpec.R line 156 we needed to take out this filter test because it did not work on the chromote headless browser:

  app$set_inputs(!!ns2("add-MAE-hd2-row_to_add") := "chromosome")
  app$set_inputs(!!ns2("active-MAE-hd2-MAE_chromosome_hd2_subset-inputs-selection") := character())

Let's drill into this why it does not work, e.g.:

• [ ] check with shiny test recorder and manual selection if other variables are being set that we need to set in the test then
• [ ] or is it something on the teal side?