Option to have a separate line in list-view for every localized page

[vadimkantorov]

E.g. have two separate lines for content/pages/help.md (default locale is fr) and for content/pages/help.ru.md

This would also make it nice to have the locale promoted to a column, and this should make for nice sorting by this column: locale.

Clicking on such a line should directly open an editor just for that locale (when parallel-language panes are disabled)

Currently all localized variants are merged into a single line:

Currently these only sorting fields are available: