Easier Adding of Ticket Categories

We have made it easier to add Ticket categories from the menu.
Select a level 1, then 2, then 3 category from the list of available categories on the left-hand side.
Selecting any Level 1 category will select all of its Level 2 and 3 child categories. Selecting any Level 2 category will select all of its Level 3 child categories, as well as its parent Level 1 category and display. Selecting any Level 3 ticket categories will select its parent Level 1 and 2 categories.
Your selected categories will then be displayed on the right hand side.