Configuration - notify backend when `quad_truncate` gets changed
Configuration - notify backend when `quad_truncate` gets changed

without `miqSelectPickerEvent`, any change in `quad_truncate` never gets propagated to the backend
=> adding `miqSelectPickerEvent`

Fixes https://bugzilla.redhat.com/show_bug.cgi?id=1650461

ManageIQ/manageiq-ui-classic,ManageIQ/manageiq-ui-classic,ManageIQ/manageiq-ui-classic,ManageIQ/manageiq-ui-classic