Pin and style group rows

[brianlove]

Pin group rows to the top of the list view table and style them distinctively from the company rows.

Closes #259, closes #260

[github-actions[bot]]

No need for rebasing :+1: behind_count is 0 ahead_count is 1

[github-actions[bot]]

☂️ Python Coverage

current status: ✅

Overall Coverage

Lines	Covered	Coverage	Threshold	Status
572	370	65%	0%	🟢

New Files

No new covered files...

Modified Files

No covered modified files...

updated for commit: fc06e9f by action🐍

[github-actions[bot]]

JavaScript Coverage

Summary

Lines	Statements	Branches	Functions
	68.11% (391/574)	58.41% (184/315)	68.06% (130/191)

Modified Files • (67%)

File	% Stmts	% Branch	% Funcs	% Lines	Uncovered Line #s
All files	68.11	58.41	68.06	67.78
components	64.18	59.67	62.3	63.72
ListViewTable.jsx	91.63	75.59	98.36	91.56	270, 353–354, 359–362, 468, 513, 673, 694–697, 713–714, 738–739, 742, 761, 781–786