:Corpus interferes with command history navigation by arrows

[mikepqr]

If you type <leader>c<cr> then : then up arrow you are dumped back in the Corpus UI and you cannot use the arrows to get back to earlier : commands (C-p still works).

I'm not sure if there's a reasonable fix given the premise of the :Corpus command, so maybe this is a WONTFIX. Perhaps special-casing the situation where the user presses the up arrow at the Corpus list, and treating that as an effort to go back through the command history?