merge all lessons in lnotes

lnotes-merge.js

$('#words-table tbody tr').remove()
var lessons = $('a[href*="/studentView/"]').map((idx,it)=>{return {name:$(it).text(), link:it.href}}).toArray().reverse();
$('.footer').html('')
var words=[];
var left=lessons.length
lessons.forEach((lesson,idx)=>{
  $.get(lesson.link, data => {
    $('.footer').html(`<div id="fetched_${idx}">${data}</div>`)
    words[idx]=$(`#fetched_${idx} #words-table tbody tr`).toArray()
	//.filter(tr => $(tr).find('td').length === 3)
	.map(tr => tr.outerHTML).join('\n')
    left--;
    $(`#fetched_${idx}`).remove();
    console.log(`${Math.round(100 - left*100/lessons.length)}%`)
    if(left===0){
       console.log('Merging...')
       words.forEach((row,idx) => $('#words-table').first()
         .append(`<tr><th colspan="3">${lessons[idx].name}</th></tr>`)
         .append(row));
       $('.well').remove()
       $('#words-table tr th:nth-child(3)').remove()
       $('#words-table tr td:last-child').remove()
       words=null
    }
  })
});
$('ul.nav').remove()
$('.page-header').remove()
//$('.tabbable').parent().get(0).style.width='100%'