Flex and grid: the layout shorthands that were quietly ignored

A batch of CSS layout fixes for pages built with flexbox and grid - the way almost every modern site is laid out. The shorthand that says 'lay these out in a row and let them wrap' now works, so items wrap onto the next line instead of squashing onto one. Items in a row can now line up on their text baseline, so a large heading beside small text sits on the same line rather than pinned to the top. And several grid placements that were being dropped - naming a cell by its row and column lines, setting those lines one at a time, and reordering items - now put things where the page asked.