Documentation clarification: can updateSelectizeInput be used with selectInput?

[daattali]

I want to create a server-side select input. Only updateSelectizeInput() has that ability. I've always had to match the input to the update function - so naturally I wanted to use selectizeInput() in the UI. However, because of #3727, I tried using selectInput() in the UI.

The result seems to work. I don't know if there are any potentially hidden bugs by using selectInput() + updateSelectizeInput(). If not, it would be good to document that they can be mixed together so that people like me wouldn't be afraid to use it when necessary.