fix keyboard focus with overlays

Don't let internal calls to motionnotify(0) meant to update the pointer
focus from maplayersurfacenotify and destroylayersurfacenotify also
shift the keyboard focus to the surface under the cursor with
sloppyfocus.

ensure that xwayland cursor defaults to left_ptr

Don't show an X cursor when closing an Xwayland window or with certain
dropdowns.

Based on https://github.com/djpohly/dwl/pull/32

enable adaptive sync

The comment in this function's declaration says the backend is free to
ignore this setting, so maybe there's no need to make it configurable?

use bool

Because it's 2020. Passing integers to wlroots variables and functions
with bool in their signature is silly.

remove -Werror=declaration-after-statement

wtf is the point of this crap? It makes the code harder to follow,
increases the line count and made me fail compilation a million times.
We shouldn't blindy follow everything about suckless's style.

remove goto when the border is 0

Rendering 0-dimension rectangles no longer crashes wlroots.

remove useless assignment

calloc already initializes ints to 0.

s/maprequest/mapnotify

This should be consistent with other function names instead of keeping
the X name.

add install target to Makefile and corresponding prefix variable to config.mk

tweak trackpad variables

Add static const and move them below in order to group the keyboard
options.

Added support for natural scrolling

Added basic tap-to-click for touchpad users

remove log flags from readme

The following commit has removed the logs but they are still in the
readme.
3b1992ca91b9a468019165c985263f5b1cc78c2c">https://github.com/djpohly/dwl/commit/3b1992ca91b9a468019165c985263f5b1cc78c2c

Made scalebox the way sway does it

Scaling a wlr_box without rounding can sometimes make the borders not
connected and nice. I noticed this when setting scale in monrules to 1.2

So I've went and copied what Sway did in desktop/output.c but without
having a second function and now using a random rounding macro I found
on the internet so as to not use round from math.h.

s/prev/old

Be consistent with the rest of the code and dwm

remove togglefullscreen keybinding

Distribute it as a patch like in dwm since graphical applications
usually provide their own keybinding; I guess it's only for terminals.

Note that even though these commits don't let you open multiple windows
in fullscreen and cycle between them like in dwm, with just
fullscreennotify spawning new windows or changing tag would still exit
fullscreen automatically, but you would have to toggle fullscreen twice
when switching back to the fullscreen window to enter fullscreen again,
so this is better since it avoids that.

Readme: achieve fullscreen + allow borderpx = 0

Quit fullscreen on new x11 window

After the removal of quitfullscreen() dwl wouldn't compile widh xwayland
enabled because createnotifyx11 was still using the old function

Delete quitfullscreen()

quitfullscreen() was replicating the functionalities of setfullscreen(c,
0)

Reusing setfullscreen() in quitfullscreen() leads to a 3 line function,
which is useless since quitfullscreen() is used once anyway

Keep windows fullscreen after redraw

This fixes the bug that happens when changing workspace (or any time
arrange() is called) where there are fullscreen windows, which are still
fullscreen but leave the space for layer surfaces like waybar (which
should be hidden when going fullscreen)

Also as soon one fullscreen window is found hte function returns to
improve efficiency