[Feature Request] Ability to select/copy text and scroll while command/find prompt is open

Description of the problem or steps to reproduce

When the command or find prompts are open with Ctrl+E and Ctrl+F, we are not able to select/copy/scroll anything into the buffers, forcing us to first Escape and then select/copy/scroll.

I stumbled upon this because I was trying to copy an option name from the help buffer to change its value with > set ..., which I had already opened. I also stumbled upon this while trying to find a word and consequently not being able to scroll in any buffers.

Specifications

Commit hash: 5fc8f84
OS: Archlinux (up-to-date)
Terminal: GNOME Terminal

PS: Thank you a whole lot for micro. As soon as I tried it, I felt a great joy and realized the pain I was inflicting to myself by using standard nano for years. It is a delight to use and brings many good, useful things to the every day work in the terminal.
Cheers,

Reproduce the issue by opening the command prompt with Ctrl+E and the find prompt with Ctrl+F, then try selecting, copying, and scrolling in a buffer. Trace the prompt and input-handling entry points responsible for these states. Done means buffer selection, copying, and scrolling work while either prompt remains open.