Make it more discoverable to create requirements for a whole table
Currently, users have to select rows and type Alt + Shift + R, to get all requirements numbered automatically. We could improve:
Show a hint in the column header,
It only works with text selection, but Confluence tables have cell selection too. So make it work with it.
Add the stuff in the leftmost cell that is selected, not just in the first cell of the row.
Use the class .mceSelected.