Don't use std::regex for parsing page size
- Avoid
std::regexdue to freezes. - Remove special handling of unicode '×', since handled by
Glib::Regex. - Add missing
DocumentUndo::done()to update undo history.
Fixes #5391 (closed)
std::regex due to freezes.Glib::Regex.DocumentUndo::done() to update undo history.Fixes #5391 (closed)