Read OBD commands to run from preferences, update result view

-Read OBD commands to run from preferences (no need no import, define  and queue commands individually here anymore or ) ,
-update TextView with results instead of keep creating new textviews (by tagging textview with command name ,  ignoring result of some results from housekeeping obd commands),
-clear all on starting live data (thus also when preferences have changed) , 	
-Mark updated values in bold