Table view seems to be much liked by my two expert editors. But they did request some changes, which I have now implemented and which require some explanation.
First, they wanted to see all the text of each version, and not restrict it to the base row in those columns where it was all the same. Second, they wanted some way to order or reorder the versions, and third, they needed a way to reduce clutter by deleting rows. Also I replaced the clumsy slider with a conventional scrollbar to enable swiping on tablets. These changes have made table view much more useful, without adding significantly to its complexity.
Moving up and down
If the user clicks on a siglum in the leftmost column two small buttons appear to raise or lower that row. After 5 seconds the buttons disappear in any case. The disappearing buttons are cool because they only appear when needed and free up the display when not. But clicking on the up button moves that row above the one immediately above, and down moves it down one row. Only the up button appears on the bottom row and only the down button on the top row.
Selecting some versions
Normally the user wants to see all the versions, but if that is a bit overwhelming the rows can be reduced by deselecting them from a simple dropdown menu in the toolbar that has been added at the foot of the display. Selected versions are shown by adding a tick-mark after their names. This reappears if it is chosen again. The usual user interface method for showing a set of options is to use checkboxes, but in this case there may be very many, and it would get too confusing. So a select dropdown is used instead. The 'rebuild' button resubmits the newly selected versions and builds a reduced (or expanded) table.