The status bar said "Opened with 1 note(s)", "Saved <path> with 1 note(s)",
"Discarded 1 recovered document(s)" and "Restored 1 recovered document(s)",
and the Global Edit options showed "Result(s): 1". They now use the singular
for 1 and the plural otherwise, in English through i18n::msg_n and in every
catalog through @msgplural rows (the Results line through an @plural row).
The engine's warnings for linked images and placed documents output as their
previews, and its errors for a page past a placed file's last page or
artboard, also name their counts in the singular or the plural.
The catalogs drop the rows no message reads any more: the plain "(s)" rows
of the changed messages and the @msg row for "Packaged {n} file(s){note}".
Follows #5002.
Replace glob `use super::*` with the names each module uses, so the
module's imports are visible at the top of the file (Sonar rust:S2208).
No code changes.
dotCooCoo