Option: XUTM ERROR SCREEN EDIT

Allows user to edit error screens.  This involves deciding whether or not
each edited screen should count the errors that occur while the screen
is in place, and whether to reset counters for screens that have already
counted some screened errors.  The screens themselves are just strings
of characters that Task Manager compares against the $ZE values of all
errors it traps.  Those errors whose $ZE values do not contain any screens
as substrings are logged, but those that do are not logged.