Set XCURSOR_SIZE

remove note about contact me for patch issues

I am no longer able to spend much time developing dwl let alone maintaining
other's patches :)

destroy old client popups when focusing another client

Closes: https://github.com/djpohly/dwl/issues/408

Prevent using a wlr_layer_surface after destroying it, due to no available outputs

correctly check if a scene node is enabled

checking only wlr_scene_node.enabled may result in a false positive because it
does not consider if its ancestors are enabled as well.

remove unneeded check of `m` in arrange()

arrange must never be called with a NULL argument

Use uint32_t for ui Arg

use fixed-size type for client tags

while the size of `int` in most compilers is 32-bits, the size of int and all
other integer types are implementation defined, so make sure we can use up to
32-bits

remove tag labels from dwl

Tag labels are not used in dwl. Only the number of tags is important.
Tag labels should be defined for each tag in whatever status bar is
used.

display clients count in monocle symbol

- Replicate missing functionality from dwl to display the client count in monocle mode
  - Add ltsymbol field to Monitor struct
  - Display client count in monocle mode when greater than zero
- Tested with somebar and dwlb

Remove rootcolor

Missing apostrophe

add missing comma in "MonitorRule"

add a missing comma for the example

Fix spacing and replace it with tabs

fix spelling

Fixed 'unused variable' compiler warning.

Add appid field to printstatus() output

Adds an appid field to printstatus which can be used to monitor the
currently active application.

implement repeatable keybindings

allow configure x and y of outputs

use sigaction(2) for signal handling

References: http://git.suckless.org/dwm/commit/712d6639ff8e863560328131bbb92b248dc9cde7.html