layersurface: create a dedicated scene tree for popups

this tree should be always above the top layer

Fixes: https://github.com/djpohly/dwl/issues/328

client: don't change border color during drags

Fixes: https://github.com/djpohly/dwl/issues/318

fix crash in dirtomon() when selmon is disabled

closemon() now updates selmon if needed

use just one loop in outputmgrapplyortest()

we do the magic in updatemons()

move focus and clients off disabled monitors

only raise the client's node in monocle()

Fixes: https://github.com/djpohly/dwl/issues/326

Revert "stop trying resize clients during commitnotify()"

This reverts commit 2d9d758c8dec083178ff78b154da784b97260bd1.

wasn't meant to be pushed to main

update comment about exclusive focus in focusclient()

stop trying resize clients during commitnotify()

instead resize them in configurex11()

allow unmanaged clients (like dzen or dmenu) to have keyboard focus

disable and destroy monitor's layer surfaces when it's being destroyed

Fixes: https://github.com/djpohly/dwl/issues/314

use `/* */` for comments in applybounds()

fix bad indentation in createpointer()

rename dragicondestroy() -> destroydragicon()

to match the rest of the code

rename LyrNoFocus -> LyrDragIcon

correctly handle cursor motion when button is held (for layer surfaces)

allow moveresize() while the left mouse button is pressed

Fixes: https://github.com/djpohly/dwl/issues/319

fix drag and drop not working

this fixes another issue where the cursor doesn't change when selecting text
but there is still an issue about not changing border color of clients during
dnd operations

Bug: https://github.com/djpohly/dwl/issues/318

avoid usage of goto

Based on this suggestion: bc72af6e2430cfb8db2f5fa1b9800c86f445b6d6#commitcomment-85592855">https://github.com/guyuming76/dwl/commit/bc72af6e2430cfb8db2f5fa1b9800c86f445b6d6#commitcomment-85592855