configTopGap top-level constant

Implementation

// 20241214 gjw On moving to using the `spacing:` parameter of `Column()` the top gap is
// added to the default spacing. So we now set it to 0 so that we get the same
// as the spacing between rows. This is a little larger than previously, but is
// okay, giving a little less crowded look.

const configTopGap = Gap(0);