(Wdevs) Login and toolbar

I worked a little more on the admin part. First, I created tables to manage users and roles and made a sql script to initialize an "Admins" role and two users ("admin" and "guest"). After that I wrote a login box then I updated my code according to the fact that the visitor is authenticated or not. I will handle roles later.

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Second, I set up a way to hide or show all admin and configuration buttons. By default, once you are logged on, I display a toolbar for screen management at the top of the screen and for each box there are an edit or configuration button before its title and an admin button after it.

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Whereas I use cute buttons, it's not practical to have all them on the screen. So I added another icon to my toolbar, which hide all other buttons when clicked. With this feature, you have the same look as normal visitors, but you're still logged as site administrator.

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And another click on the hide/show icon and all buttons come back.