How about a common menu?

[richardtomkins]

I took the menu out and put it in a separate file, mmenu.html and fixed the duplicate DropDownBlog.
In every other HTML file I repalced the

... with,

.
At the bottom, right after <script src="vendor/bootstrap/js/bootstrap.bundle.min.js"></script> I added,
<script>
$('#navigation').load('/mmenu.html');
</script>.
Now, there is a single menu for all pages, makes it easier to use.
I also found some bugs such as an extra in one file and obsolete attributes in use in other files by using the w3c html validator.

[DonaldTrump88]

I have noticed the problem.
Check my pull request
#43

It solves the problem. :)