I lost my Sidebar on Facebook?

[Jos]

So here's the thing.

My Sidebar on Facebook seems to be dissapeared.

I'm not talking about the chat/activity bar on the right side, but this one:
http://gyazo.com/3c0c884178f72d1f66478136ae61d2dd

I can only see the Favourites, but the rest like 'Apps' seem to be gone.

How can I Undo whatever I have done, to get this back?

Thanks in advance!

[pri✍]

It's just Facebook glitch, you just have to wait for FB to resolve it, nothing else you can do.