A c:legendEntry can give one legend entry its own text (c:txPr), as
decks do to make legend text white on a dark chart. It was never read,
so every entry drew in the legend's text. The chart model keeps each
entry's size, bold and colour (Chart::legend_entries); the reader
takes them from the entry's c:txPr, the legend draws each name, key
and row at its entry's size and in its weight and colour, and a chart
rebuilt after an edit writes them back before c:overlay, in schema
order. Entries that set none of the three are not kept.
Fixes#2067
Hamza
1d608bb464