handle the x11 configure event

This fixes the window size of old games in Wine.

implement the virtual keyboard protocol

This is used by wtype.

Also properly cleanup keyboards. Without wl_list_remove(&kb->link) dwl
crashed after using wtype 2-3 times.

Allow toggling the layout before selecting a different one

Implement the idle protocol

It allows clients such as swayidle and chat applications to monitor user
idle time.

deactivate focused client when spawning a new one

Because maprequest immediately calls wl_list_insert(&fstack, &c->flink),
in the following call to setmon(), the selclient() which is passed to
focusclient() as the old client is actually the newly mapped client, and
the real old one is never deactivated. You can see this by, for example,
opening Chromium's devtools, then spawning a terminal. The background of
the focused line in the devtools doesn't change from light blue to grey.

We can't just remove wl_list_insert(&fstack, &c->flink) from maprequest,
because calling wl_list_remove in focusclient() with a client that has
not been added to the list causes a segmentation fault.
Therefore we fix the focusclient call by not passing it the old client
every time, but instead using the wlroots function that gets the focused
surface and deactivate that, like in TinyWL.
This also avoids getting the selected client and passing it to
focusclient() on every call unnecessarily, and will allow removing
shouldfocusclients in a future commit by checking if old is a layer
surface instead.

implement the wlr-data-transfer protocol

It makes wl-clipboard work properly in neovim, without having to create
a transparent surface that steals focus and causes flickering. It's also
required for clipman.

fix temporarily disabling a single monitor

The code in this else completely freezes my system when I run the
swayidle command to replicate xset dpms force off. No idea if it works
on multiple monitors, but for now avoid running when there's 1 monitor.

Also remove the comment with the function name in sway.

Don't switch to another disabled monitors

Since wlr_output_enable doesn't have any effect before finishing all the
procedure, a little hack allows to make use of focusmon(), which must
know the latest in about which output is currently disabled

Also improve performance in focusmon() and cleaner code in
outputmgrapplyortest()

Fix crash with no monitors left

When there's no monitors left, prevent the while in cleanupmon() to
become an infinite loop

Also switch to the left monitors instead of the right

closemon() has now only 1 parameter

Don't switch to disabled mons after unplug

Merge branch 'handleUnplug' into output-management

Back to closemon() with one parameter

With the recent changes in output-management, the extra argument in
closemon() would be needed only when unplugging the monitor, so it isn't
worth it anymore. Also now is more efficient.

Disable mon faster

Since focusmon() now never focuses disabled monitors, there's no need to
focus the disabled monitor first

Fix crash when disabling focused mon

m->link.next leads to errors if the monitor to disable doesn't have a
"next" (right) monitor and is currently focused. dirtmon() does more
checks.

In some previous commits m->link.next is told to be left monitor, which
is wrong

Also focusclient() explicitly checks for disabled monitors (this fixes
in case of more than one disabled monitor)

Merge branch 'handleUnplug' into output-management

Fix crash unplugging focused mon 2

Focus the top client on newmon, which we know for sure that it isn't
going to be unplugged or disabled and actually set that as the focused
monitor to move the focus. This is necessary to prevent crash when
disabling monitors with the output-management patch.

Merge branch 'handleUnplug' into output-management

Fix crash unplugging a focused mon

Focus newmon, which we know for sure that it isn't be unplugged or
disabled

Merge branch 'handleUnplug' into output-management