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

Author: dregad

Source/pages/view.php

@@ -60,6 +60,8 @@ function( $p_bug_id ) use ( $t_view_bug_threshold ) {
 
 $t_update_form = $t_use_porting && $t_can_update;
 
+require_css( 'status_config.php' );
+
 layout_page_header( plugin_lang_get( 'title' ) );
 layout_page_begin();
 ?>