DDMsgReader: Quick-validation of local user (Ctrl-Q) - For issue #548

Requested by nelgin. There is now a quick-validation hotkey, Ctrl-Q, for sysops to use to apply a quick-validation set to a user when reading their message. Quick-Validation sets are configured in SCFG > System > Security Options > Quick-Validation Values. There is a new configuration option: quickUserValSetIndex, for the quick-validation set index (or an invalid value to use a menu of validation sets). This should resolve issue #548 (closed)