[BUG] Button gets pressed on mouse hover with crossterm

**Describe the bug**
Hovering over a button presses it when using the crossterm backend. Termion has the correct behavior.

**To Reproduce**
1. `cursive = { version = "0.20.0", default-features = false, features = ["crossterm-backend"] }`

2. Use the example code:
```
use cursive::views::{Dialog, TextView};

fn main() {
// Creates the cursive root - required for every application.
let mut siv = cursive::default();

// Creates a dialog with a single "Quit" button
siv.add_layer(Dialog::around(TextView::new("Hello Dialog!"))
.title("Cursive")
.button("Quit", |s| s.quit()));

// Starts the event loop.
siv.run();
}
```
3. Touch the quit button with the mouse cursor.

**Expected behavior**
Nothing happens unless I left-click.

**Environment**
* macOS Sonoma 14.0, M1 pro
* Backend: crossterm
* Current locale:
```
LANG=""
LC_COLLATE="C"
LC_CTYPE="UTF-8"
LC_MESSAGES="C"
LC_MONETARY="C"
LC_NUMERIC="C"
LC_TIME="C"
LC_ALL=
```
* Cursive version: 0.20