no mouse modifiers using konsole

[deltanedas]

Describe the bug
Mouse up/down/move events never have KeyModifiers applied.
Tested with ctrl and alt, shift+click is used directly by konsole so that probably shouldn't be known.

To Reproduce

1. compile this using latest crossterm on crates.io:

use std::io::stdout;
use crossterm::*;
fn main() -> Result<()> {
	terminal::enable_raw_mode()?;
	execute!(stdout(), event::EnableMouseCapture)?;
	println!("Capturing events, press any key to exit\r");
	loop {
		let event = event::read()?;
		println!("Event: {event:?}\r");
		if let event::Event::Key(_) = event {
			break;
		}
	}
	terminal::disable_raw_mode()?;
	execute!(stdout(), event::DisableMouseCapture)
}

2. run it
3. hold ctrl and click, modifiers are still NONE!

Expected behavior
hold control to get a modifier

OS
linux 5.18.0-4-amd64

Terminal/Console
Konsole X11 22.04.1

[TimonPost]

I moved your report over to: #685.