fix: correct behavior with other patches that change VISIBLEON

This fixes problems with patches like istticky,
where the sticky window would be visible on every monitor.
It's not. It should be visible only on its monitor.
SVIBISLBEON should always be adapted with those patches.
It's used just for singletagset when looking where a window
should be visible

fix: attach clients to reenabled monitor

fix: do not segfault on selmon NULL

Fix clients with NULL monitor being VISIBLEON

Fix getunusedtag, attachclients

If client is on multiple monitors, it should
be hidden, as the client is visible just on one of
the monitors, and on the other there is empty space instead

Unused tags are only the tags that are not on any
of the monitors.

singletagset

add acknowledgment to djpohly

Destroy fullscreen node after moving clients off mon

fix posible NULL-dereference in wl_surface.commit handler

unset DISPLAY before setting up xwayland

only execute the first keybinding

more style fixes

missed from the previous iteration

create a wlr_keyboard_group for virtual keyboards

Fixes: https://codeberg.org/dwl/dwl/issues/554

fix typo

Fixes: 7afdc191fe4e9b3d16604b7f0c96f9741247e2d2
Thanks to: David Donahue <david.donahue2996@gmail.com>

tie xdg_toplevel_decorations to Client

a xdg_toplevel can only have one xdg_toplevel_decoration so there is no need to
have a new struct for decorations

Revert "nuke CSDs, hopefully for good!"

The compositor must respond to the client requesting a change to the decoration
mode, it does not matter if the compositor chooses a different mode.

This reverts commit 9071ce6c848ce214939fb84f85ae77de86de88d7.

Revert "remove typedef `Decoration`"

This reverts commit d1ff1e6f75d9c53c953957b5c0a64e0bcb40008b.

style fixes

use wlr_keyboard_group to manage all keyboards

check toplevel resources

it's just a aesthetic change