Maybe someone could be interested in, I have written some modifications in order to classify change logs based on this organization:

Evolutions: Features resolved and closed
Corrections: Non-features resolved and closed
In progress: Everything non-resolved and non-closed

It is based on files changelog_page.php and custom_function_api.php and it works :)

Noticed that only French and English lang files have been updated:

lang\strings_english.txt(line 1185):

Changelog

$s_changelog = 'Change Log';
$s_evolutions = 'Evolutions:';
$s_corrections = 'Corrections:';
$s_in_progress = 'In progress:';

lang\strings_french.txt (line 1190):

Changelog

$s_changelog = 'Liste des changements';
$s_evolutions = 'Evolutions :';
$s_corrections = 'Corrections :';
$s_in_progress = 'En cours :';

Benjamin for FWA