New subcategory and notification structure on forum

To make navigation easier, the main Law and practice category now has four subcategories:

The Law and practice page still shows topics from all the new subcategories. Links to the subcategory pages appear in the sidebar menu.

The default notification setting is :fasbellone: (“watching first post”) for each subcategory, but you could choose to have different settings for each subcategory. For instance, if you are a Court of Protection lawyer you might want to keep Mental Capacity Act at :fasbellone: but change the others to :farbell: (“normal”) so that you don’t get sent any notifications about them.

The Updates category has been structured similarly, with MHLO updates and MHLO monthly updates as subcategories, but with :farbell: being the default notification setting.