add prefix or suffix

Add a prefix or suffix to the names of selected glyphs.

RF3 RoboFont 3 code which still works in RoboFont 4. Not updated to the new RoboFont 4 APIs yet.

add string
a string to be added before or after the glyph names
prefix / suffix
choose whether to add the string before (prefix) or after (suffix) the glyph names
apply
add the prefix or suffix to the names of the selected glyphs
overwrite
overwrite existing glyphs with new name
duplicate
rename glyphs as duplicates and keep original glyphs