'Converts minutes to Human-friendly time format
:rtype str'

def get_estimated_time(self):

    if (self.estimated_time is None):
        return ''
    time = timedelta(minutes=self.estimated_time)
    days = time.days
    seconds = time.seconds
    hours = ((days * 24) + (seconds // (60 * 60)))
    seconds %= (60 * 60)
    minutes = (seconds // 60)
    seconds %= 60
    string = ''
    if (hours or minutes):
        if hours:
            string += (_('%2i    hours    ') % (hours,))
        if minutes:
            string += (_('%2i    minutes') % (minutes,))
    else:
        string = _('Less    than    1    minute')
    return string
