PostgreSQL's json column type returns parsed values directly (boolean
false instead of string "false"). The backend code used a truthy check
which failed for boolean false values, causing null to be returned
instead of the actual false value.
Changed condition from `if (setting.setting_value)` to explicit null
check `if (setting.setting_value !== null && setting.setting_value !== undefined)`
and added handling for already-parsed json column values.
Fixes#117
Paul Nothaft
808ed1d2f1