Comments, history & assigning people — Ask a question about a whole table

Some questions aren't about one row — "where are all the US orders?", "should this table have a region field?". Those go in the table's own thread: press Discussion in the toolbar above the grid. It works exactly like a record comment, @mentions included, and the button shows how many messages the thread holds. A table thread belongs to the table, not to the view you happen to be looking through — so everyone finds the same conversation whether they're on the grid, the board or the calendar, and a thread can never end up stranded on a personal view only its owner can see. Mentioning someone links them straight back to the table with the discussion open.