bug: removing open file mangles window selector functionality

[brandon1024]

Issue Description

Whenever you remove a file (<plugin>(fern-action-remove)) that happens to be the only file open in a window, the file is deleted, the buffer is unloaded, the window is closed, and the fern window is adjusted to fill the screen. This works as expected.

However when this happens, the<plugin>(fern-action-open:select) mapping no longer works as expected. It offers to open files in the fern window too, though normally it doesn't offer this window to be used. I haven't figured out how to work around this, aside from reloading vim. A bit annoying.

You can see what I mean from the screenshot below. Usually it doens't offer to open in the Fern window.

[lambdalisue]

Please write a minimal vimrc and step by step procedure to reproduce that situation.