Add option to display due/done dates also in natural language

[schemar]

Using moment().calendar(), we could show due dates etc. also as “next Friday”, etc.

I think it should be configurable in the options and support:

1. 📅 2021-05-02
2. 📅 2021-05-02 (Sunday)
3. 📅 Sunday

[schemar]

Use

moment.calendar({
    sameDay: '[Today]',
    nextDay: '[Tomorrow]',
    nextWeek: 'dddd',
    lastDay: '[Yesterday]',
    lastWeek: '[Last] dddd',
    sameElse: 'YYYY-MM-DD'
});

[schemar]

Actually use from as in the short mode tooltips.