Make sure status colors CSS is available
Make sure status colors CSS is available

Starting with MantisBT 2.26.0, status_config.php (dynamic CSS for status
colors) is no longer systematically loaded by MantisBT core, it has to
be requested by individual pages that need it

Fixes #398

mantisbt-plugins/source-integration,mantisbt-plugins/source-integration,mantisbt-plugins/source-integration