p^95 markup seems to override char-style stretch.

[davidg-sil]

https://community.scripture.software.sil.org/t/underlines-descenders-and-stretching-text/3577

[davidg-sil]

Not sure if I've taken the right approach, though.

[davidg-sil]

• p^95 - style markup shrinks all styles proportionately. This seems the correct approach in general.
• Stylesheet-based p_95 - style markup will leave character styles which specify a stretch factor untouched. Thus both possible user-demands are available, via the UI and changes file.
• User-interface bases setting uses old-style :extend=0.95 which is equivalent to =[extend=0.95], and thus does not cascade in current version in git.
• Users who want to use (new) cascading extend will at present need to use manually edited style sheet.