Well-done.
I have previously made up a question about "so that". As far as I know, "that" can be left out in an informal style in some common two-word conjunctions, such as "so that, such ... that, now that, providing that, considering that".
Eg: come in quietly so (that) she doesn't hear you.
However, In my previous thread and your second definition, "so" has been left out. Why is that?