Dictionary serialization is slow.

[Lazy Knight]

When I edit an existed dictionary item key, it's usually slow. And when the item number of dictionary got too many (like more than 100 items), or dictionary fields more than one in a monobehaviour on the inspector, it's getting slow too.

It's not a big problem, I just want to point it out here.

Odin Version: 2.0.15 Unity Version: 2018.3.6f1 Personal