[Feature] Ability to change the cursor in the header on WIndows FullScreen

I have been trying to get vim-like keybindings to work with a Normal/Insert mode, and while I was successful I have failed to find a way to change the cursor when in full screen mode. From what I gather on Windows it is using tcell to render, and the caret/cursor is hardcoded to a block. TCell has the ability to change the cursor, so it would be great if that could be exposed like --bind=start:change-cursor-style(steady-bar).