Scrollbars and other draggable elements get stuck mouse leaves browser window

[DrSloth]

Describe the bug

This bug is exclusive to wasm.
When dragging a scroll bar and then leaving the browser window with the mouse makes the scrollbar "stuck". It will only be unstuck by clicking into the browser window again, until you click again there will also be no hover effects or any other interaction.

I was able to observe and consistently product this bug on both windows and debian linux.

To Reproduce
Steps to reproduce the behavior:

1. Open egui.rs
2. Open any window with scrolling, for instance the scrolling demo window
3. Click and hold the scroll handle
4. Move your mouse outside the browser window without releasing the mouse button
5. Try to interact with anything else
6. After clicking the scrollbar will jump

Expected behavior

I would expect the scroll bar to treat the mouse leaving the window as releasing the mouse button.

Desktop (please complete the following information):
I tested this on both Debian and Ubuntu Linux as well as Windows in Firefox, Chromium and Chrome, the behavior was the same in every browser.
The problem seems to be exclusive to wasm.

Additional context

When given pointers i would definitely be willing to track down the cause of the problem. It seems to be quite deep as other draggables such as sliders inhibit similar but not as disrupting problems

Thanks for all your hard work and have a great day ::)

[rustbasic]

Perhaps in the current egui, scrolling is only allowed when the mouse pointer is hovering over it.

This is related, right?

[DrSloth]

Maybe. Currently i definitely can scroll when not hovering the scrollbar. I can only start scrolling when i hover it but i can keep scrolling when my leaves it.