Visual Studio 2012 "Show All Files" button missing

In my solution I have three projects: Console application, class library, and a website project. The Show All Files button is visible on the console and class library project, but soon as I click on the website project the button disappears.

I am running Visual Studio 2012.

I just got the same problem "Solution Explorer toolbar missing" eg. "Show all files". Here's what I did:

1. Right click your "Solution".
2. Select "New Solution Explorer View". This will pop-up a new "Solution Explorer" window with toolbars in it.
3. Close you original "Solution Explorer" window.

Click on folder which must contain target file and Solution explorer properties will be changed. There you can find Refresh button and Show all files button.

Check this post: Improved Solution Explorer in Visual Studio 2012 to Improve Productivity

"Show All Files" is not shown in a Web Site Project because it's not needed and all files are already shown in the Solution Explorer. I think that this behavior is the same for older versions of VS