Adds an env variable WINE_WAYLAND_UNACCELERATED_POINTER
which allows raw input. This makes it easier to calculate
the same sensitivity in different games, use sensitivity
calculators, and easily change values when changing DPI
and do not depend on the compositor or OS.
For example, you want to set the sensitivity to half as much,
and sensitivity curves in libinput are more difficult
to calculate than in the games themselves.
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v4: winewayland.drv: Add unaccelerated pointer support
https://gitlab.winehq.org/wine/wine/-/merge_requests/4698