WEB: Fix content layout

Setting a height of 100% in the content (rbcontent) cuts it off, as
overflow is hidden. Allowing a dynamic height is the correct way to
render the rbcontent section
WEB: Disable PHP notices by default

The site code accesses a lot of uninitialized variables, which fills
the screen with notices on my system. Disabling notices by default is
probably best for the current code base