Revert "various improvements to layer surface"

see https://github.com/djpohly/dwl/issues/289#issuecomment-1231287114

This reverts commit 226051974060746d02d787ac1ef70b6267ee51b4.

various improvements to layer surface

- remove various useless assignments of layersurface->mon
- styles changes
- do not set wlr_layer_surface->output to NULL at destroy

conform the idle inhibitor protocol

previously we disable idle tracking simply due to the fact that it exist

new function to notify keyboard enter

sort client.h functions

prevent an infinite loop if try to use focusmon() with all monitors disabled

don't try to set monitor for clients in createmon()

this is done in updatemons()

set monitor for clients that don't have one in updatemons()

only if selmon is enabled and the clients are mapped

set monitor for clients that don't have one on monitor creation

don't respect size hints for fullscreen clients

Fixes: #292

change type of c->bw: int -> unsigned int

reorder isfullscreen in Client definition

initialize to zero the box used in commitnotify()

handle client_from_wlr_surface() receiving a subsurface

fix crash when setting a custom mode

rework outputmgrapplyortest()

first disable requested monitors, then enable and/or change mode, x and y, etc.
This is mostly what sway does

2200: let's use this wisely

Looks like [suckless-dev] was right about one thing.

fix dist target

use `git describe` to generate version

check client_from_wlr_surface() returning NULL in urgent()

fix #281