* fix(menus): Handle Installed and NotInstalled options correctly in the
menus
This functionality was temporarily removed. This commit adds that
functionality back.
* fix(tests): Mock InstalledRemotePackageNamesFn when necessary
* add missing locales
* use t.Setenv instead of os.Setenv for tests
* locale: present y/n if localisation is not latin. Always accept y/n in every case
* question: use operation info for question
* edge case where localised n is equal to default y
* add tests for basic locales