simplify focusclient

This arranges the function into some logical tasks: deactivate the old
client, update wlroots' keyboard focus, update our data structures, and
activate the new client.  The last two only need to be done when
focusing something new, so an early return saves some horizontal space.

remove now-unused variables in focusclient

add tag bitset check from dwm

attach_render and commit are all that's needed

attach_render tells the output that a "new" buffer has been prepared
(even if we haven't changed it).  We need to call that and then commit
it to keep the render loop going.

Software cursors will freeze momentarily during layout updates, but I
suspect that this is not as easily fixed as it sounds.  You can force
software cursors by running:

    WLR_NO_HARDWARE_CURSORS=1 ./dwl

style fixes

do not render frames when any surface has uncommitted resizes

Merge pull request #29 from alex-courtis/tidy-activate-notify

tidy activate notify resource

tidy activate notify resource

Merge pull request #26 from guidocella/bind-togglelayout

Bind layout toggle

Bind layout toggle

change text wrapping

editors are more than capable here

add zero flicker to goals

have selborder, still no urgent support from Wayland

make border color selection concise

Merge pull request #21 from mchackorg/focus-color

Add support to change focused window's border color

Add support to change focused window's border color

Update issue templates

remove client.isx11 in favor of client.type

ok, treat it like an enum

do managed/unmanaged check in map and unmap