A table whose style the file defines (its parts and background drawn
since #292 and #294) edits like the others: the caret is laid out with
the file style's lettering (a regular header where the built-in style
bolds it), a double-click selects the word drawn there, a click moves
the caret to the clicked cell and a border drag resizes the columns
while the cell stays edited.
pierrevbc
44a032d3de