vim: Display invisibles in mode indicator (#35760)

Release Notes:

- Fixes bug where `ctrl-k enter` while in `INSERT` mode would put a
newline in the Vim mode indicator


#### Old
<img width="729" height="486" alt="OldVimModeIndicator"
src="https://github.com/user-attachments/assets/58742745-5a58-4e7b-a1ef-29aa3ff1c4f7"
/>

#### New
<img width="729" height="486" alt="NewVimModeIndicator"
src="https://github.com/user-attachments/assets/e636359a-06b6-4cdd-9e62-5dc52c6f068f"
/>
e1d31cfcc3AidanV committed on 8/18/2025, 3:52:25 PM· committed by GitHubparent48fed86
1 file changedLine totals unavailable