Fallback content missing from list view

[brianlove]

When the group selection interface was reworked, it turns out that I removed the fallbackContent prop entirely, not just the group selection-specific portions: https://github.com/georgetown-cset/parat/pull/156/files#diff-ba3697f91a401bfa286b097d160a1077235f101ee783cbe1b201838d52d6ea11L554 I don't remember (and didn't find) any mentions about intending for the fallback content to be removed.

Assuming that we still want fallback content, there are a still issues that will need to be resolved:

• If a group is selected, its row is considered to be a result, and so even if there are no actual companies in the results, no fallback content is displayed
  • This probably requires a change to <Table> to trigger when fallbackContent displays
  • Alternatively, if the only data rows would be groups, then maybe filter it out so that there truly are no results in this case (would likely require no changes to UIC)
• There seem to be (more 😭) table border issues with the header rows and summary footer rows in these cases.

@za158 Should the fallback content be re-added to PARAT? Mockup below:

Existing	With fallback content

[za158]

I much prefer "With fallback content"