Template for the Harris layout.
Variables:
- $title: The page title, for use in the actual HTML content.
- $messages: Status and error messages. Should be displayed prominently.
- $tabs: Tabs linking to any sub-pages beneath the current page (e.g., the view and edit tabs when displaying a node.)
- $action_links: Array of actions local to the page, such as 'Add menu' on the menu administration interface.
- $classes: Array of CSS classes to be added to the layout wrapper.
- $attributes: Array of additional HTML attributes to be added to the layout wrapper. Flatten using backdrop_attributes().
- $content: An array of content, each item in the array is keyed to one
region of the layout. This layout supports the following sections:
- $content['header']
- $content['top']
- $content['content']
- $content['sidebar']
- $content['sidebar2']
- $content['bottom']
- $content['footer']