A grid with checkbox selectors, with select-all enabled
(top checkbox, and Ctrl/Cmd+A)
Tests for resetting columns (should not cause errors):
A grid with radio selectors
A grid with checkbox selectors, with select-all disabled, blank label in selector column
A grid, initially without a selector column
Tests for resetting columns (should not cause errors, and selectors should work):
A grid with checkbox selectors and column sets