cider-switch-to-last-clojure-buffer shouldn't always split the current window

[jwr]

I have cider-repl-display-in-current-window set to t, as I like to work with a single full-screen window.

However, pressing C-c C-z while in the repl will not switch me back to the last clojure buffer in the same window. Instead, it will split the window. This is unexpected and (I think) inconsistent, as pressing C-z C-z repeatedly will fill the screen with copies of the repl window.

I think cider-switch-to-last-clojure-buffer behavior should depend on cider-repl-display-in-current-window setting.

[jwr]

Much appreciated, thanks!