I don't think so; the pause dialog was above it. But I'd have to check...

I just had an issue just like this old 0.12 bug report :

I was in a multiplayer game, and my friend paused while I was looking at the research tab (T).

I couldn't access the menu by pressing Escape. I could bring up the chat, but it appeared behind the research tab :/

Let me know if you need ...