add support for wp-fractional-scale-v1

References: https://gitlab.freedesktop.org/wlroots/wlroots/-/merge_requests/3511

chase wlroots!4000

References: https://gitlab.freedesktop.org/wlroots/wlroots/-/merge_requests/4000

chase wlroots!3391

References: https://gitlab.freedesktop.org/wlroots/wlroots/-/merge_requests/3991

follow upstream xwayland_surface changes

wlroots removed the `wlr_surface_is_xwayland_surface` function, and renamed `wlr_xwayland_surface_from_wlr_surface` to `wlr_xwayland_surface_try_from_wlr_surface`.

related commit: https://gitlab.freedesktop.org/wlroots/wlroots/-/commit/fbf5982e3838ee28b5345e98832f6956c402b225

Merge remote-tracking branch 'upstream/main' into wlroots-next

bump version to 0.4

remove `--long` from git-describe command

return early if selmon is not part of the output layout in dirtomon()

instead of checking twice

simplify check in urgent()

we only care if it returned a client or not

arrange monitor after updating fullscreen background and lock surfaces

also update locked_bg node position in updatemons()

add blank lines to make updatemons() more readable

update comment about client_set_size() as no-op

check if a client is resizing before checking if it's visible

It's not like it's noticeable, but theoretically this is faster

only mark pending resizes as completed checking the configure serial

Merge branch 'main' into wlroots-next

bump version to 0.4-rc3

do not try to resize if size wouldn't change

do not skip frames if a client is stopped and have a pending resize

Revert "Revert "fix flickering when resizing/spawning windows""

This reverts commit 4a32293548667e68cd9a103e22368b8db1754deb.