linux: Various X11 scroll improvements (#18484)

Closes  #14089, #14416, #15970, #17230, #18485

Release Notes:

- Fixed some cases where Linux X11 mouse scrolling doesn't work at all
(#14089, ##15970, #17230)
- Fixed handling of switching between Linux X11 devices used for
scrolling (#14416, #18485)

Change details:

Also includes the commit from PR #18317 so I don't have to deal with
merge conflicts.

* Now uses valuator info from slave pointers rather than master. This
hopefully fixes remaining cases where scrolling is fully
broken. https://github.com/zed-industries/zed/issues/14089,
https://github.com/zed-industries/zed/issues/15970,
https://github.com/zed-industries/zed/issues/17230

* Per-device recording of "last scroll position" used to calculate
deltas. This meant that swithing scroll devices would cause a sudden
jump of scroll position, often to the beginning or end of the
file (https://github.com/zed-industries/zed/issues/14416).

* Re-queries device metadata when devices change, so that newly
plugged in devices will work, and re-use of device-ids don't use old
metadata with a new device.

* xinput 2 documentation describes support for multiple master
devices. I believe this implementation will support that, since now it
just uses `DeviceInfo` from slave devices. The concept of master
devices is only used in registering for events.

* Uses popcount+bit masking to resolve axis indexes, instead of
iterating bit indices.

---------

Co-authored-by: Thorsten Ball <mrnugget@gmail.com>

crates/gpui/src/platform/linux/x11/window.rs

@@ -29,7 +29,7 @@ use std::{
     sync::Arc,
 };
 
-use super::{X11Display, XINPUT_MASTER_DEVICE};
+use super::{X11Display, XINPUT_ALL_DEVICES, XINPUT_ALL_DEVICE_GROUPS};
 x11rb::atom_manager! {
     pub XcbAtoms: AtomsCookie {
         XA_ATOM,
@@ -475,7 +475,7 @@ impl X11WindowState {
             .xinput_xi_select_events(
                 x_window,
                 &[xinput::EventMask {
-                    deviceid: XINPUT_MASTER_DEVICE,
+                    deviceid: XINPUT_ALL_DEVICE_GROUPS,
                     mask: vec![
                         xinput::XIEventMask::MOTION
                             | xinput::XIEventMask::BUTTON_PRESS
@@ -487,6 +487,19 @@ impl X11WindowState {
             )
             .unwrap();
 
+        xcb_connection
+            .xinput_xi_select_events(
+                x_window,
+                &[xinput::EventMask {
+                    deviceid: XINPUT_ALL_DEVICES,
+                    mask: vec![
+                        xinput::XIEventMask::HIERARCHY,
+                        xinput::XIEventMask::DEVICE_CHANGED,
+                    ],
+                }],
+            )
+            .unwrap();
+
         xcb_connection.flush().unwrap();
 
         let raw = RawWindow {
@@ -1253,7 +1266,7 @@ impl PlatformWindow for X11Window {
             self.0.x_window,
             state.atoms._GTK_SHOW_WINDOW_MENU,
             [
-                XINPUT_MASTER_DEVICE as u32,
+                XINPUT_ALL_DEVICE_GROUPS as u32,
                 coords.dst_x as u32,
                 coords.dst_y as u32,
                 0,