Very nice! Although, I have two suggestions. Could you separate sp/mp from type? The server/client field could be a field that only applies if the MP/SP field is either both or MP. Likewise, could you change the Type field to take into account left-handedness, can-fail or control-structure? (ie. player_get_agent_id would be left-handed, player_is_active is a can-fail, and try_begin is control-structure)
One more suggestion would be a separate, similar database for commonly used scripts, especially game scripts that may have not-so-obvious or obfuscated inputs or outputs. Possibly, you could have even a third one for triggers?
Also, on an aesthetic note, the floating menu looks kinda off to me. Perhaps make it a floating side-bar, or at the bottom of the screen? Right now, it's in the place where my eye's first look if I'm "below the fold" of a web page.