Sup guys! For you DotA/HoN veterans who love the ` key for the courier like me, I've found the solution for that while messing with the console, and it works great.

Based on the third post, change the binding for the console key.
bind "f8" "toggleconsole"
I used f8 to make it like HoN, but you can bind it to whatever unbound key you like.
Then bind ` to the courier.
bind "`" "dota_select_courier"

Just tested during practice.

Hope this ain't a repost. Enjoy!