add clock time stamp, hh:mm:ss, in the list of / for easy pick up

[jcorus]

here is a suggested code for reference:

slash-command.js:

showSlashDatePicker(anchorRect, function (date, time) {
    const formattedDate = (typeof window.poznoteFormatDateOnly === 'function')
        ? window.poznoteFormatDateOnly(date)
        : date.toLocaleDateString();
    const formattedTime = time && typeof window.poznoteFormatTimeOnly === 'function'
        ? ' ' + window.poznoteFormatTimeOnly(new Date(2000, 0, 1,
            parseInt(time.substring(0, 2), 10),
            parseInt(time.substring(3, 5), 10)))
        : '';
    insertMarkdownAtContext(insertionContext, formattedDate + formattedTime, 0);
}, null, { withTime: true });

[timothepoznanski]

#1395