Yes, I didn't realize at first that his was linked to in the drop-down menu. That makes perfect sense to lock it. I didn't have any grand designs for it. I merely made a crude "nav box", like you often see on Wikipedia to navigate between Expansions. Mostly, I did this because I hate taking the extra step of clicking the back button to get to the list of all expansions and then clicking a second time to get to the next one I want to look at. Yes, I am that lazy.
The template I made is Template:EQExpansions. Feel free to use it or not use it as you see fit. I added it to all of the unlocked expansion wiki entries.