Edit text set a paragraph whose font lacks a typed character (an accent
missing from a subset) in a standard font, always under the resource
name PCEdHelv, whatever face it stood for. Rewriting a bold paragraph
after a regular one replaced PCEdHelv with Times-Bold, so every
paragraph set in the earlier stand-in turned bold, and the editor's
draft measurement saw those paragraphs change and grew its frame over
them.
The stand-in is now named after its face (PCEdTimesBold, ...), as the
line and region rewrites already name theirs.
Fixes#4280
Lcoding15
0b3b243e9a