Add action to do stuff before the admin menu is rendered

[llucax]

Here is a trivial patch to allow users to inject some stuff in the Admin pages HTML body before the menu is rendered. The new action is called 'before_admin_menu_header', feel free to use a better name.

Trivial patch

Use-case for said action?

More flexibility customizing the layout of the admin interface.

How exactly? Could you provide some example code?

Maybe this is a stupid example, but something like:

function f()
{
    echo "<div id=\"someid\">Some HTML before the menu</div>\n";
}
add_action('before_admin_menu_header', 'f');

If you like to know exactly what kind of HTML I like to add before the menu, I really don't know, it was a graphic designer request. We need to customize the admin theme.

PS: This is the first time I'm posting a patch here, after I removed the 'reporter-feedback' I thought maybe I shouldn't. Please let me know if I should keep it until you think you don't need more feedback from me.