dirtometer: Save window size and keep_above setting in config file
dirtometer: Save window size and keep_above setting in config file

- Save contents of %config hash at shutdown and restore them at startup

cmusatyalab/openisr,cmusatyalab/openisr,cmusatyalab/openisr,cmusatyalab/openisr,cmusatyalab/openisr