Add ability to disable OSC 9 progress bar in tab and taskbar

Description of the new feature

I find the progress bar showing up in various tools (like when Rust is compiling) to be very distracting.

Furthermore often it gets stuck, perhaps this is related to the keyboard cursor blinking rate being disabled -- as there are similar Windows bugs related to that specific feature.

Still, it doesn't seem like we can disable this taskbar progress bar on Windows. So it would be nice if we could disable it in the Terminal.

Proposed technical implementation details

No response