If installer sets prefer option to false, the manager should too. Fixes #2359
Minor typo fix

introduced from 6ce0bf7cbf5edc622a8ccfbca226ffc825ca699e with #2314
Merge pull request #2414 from matthieuauger/fix/2359/config-option-overwrite-cli

If installer sets prefer to false, the manager should too. Fixes #2359
Merge pull request #2417 from glensc/patch-2

Minor typo fix