I would like to request for 2 new features of pgAdmin:
It would be nice to have possibility to group pgAgent jobs into folders (only for presentation purposes). This will simplify maintenance and grouping large number of jobs. These folders should be defined by user with possibility to build a tree like structure (folder of folders).
It would be nice to have Enable/Disable option in context menu on job node (like on trigger node). Of course this is available in Properties.