Unfortunately, no, you haven't missed anything. It is on our rather extensive "things to do" list but we haven't gotten there yet.
In the meantime, I would recommend is going into source mode, copying the source (CTRL+C) to your favourite text editor (Notepad, Notepad++, VIM, etc.), doing the find/replace there, and pasting the code back CTRL+V). We use this technique quite frequently and, while not perfect, is a lot easier than just using the "search" feature inside of the built-in editor.
#DashBoard