feat: Enhance Gantt chart functionality with task filtering and styling improvements

templates/tasks/main_view.php

@@ -261,6 +261,7 @@
         $( '.tasks_container .tasks_suspended ul' ).empty().append( data.tasks_suspended );
         $( '.tasks_container .tasks_to_do ul' ).empty().append( data.tasks_to_do );
         $( '.tasks_container .tasks_fvat ul' ).empty().append( data.tasks_fvat );
+        gantt_chart.refresh( data.tasks_gantt );
       }
     });
   }