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

Missing apostrophe

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

return early if selmon is not part of the output layout in dirtomon()

instead of checking twice

simplify check in urgent()

we only care if it returned a client or not

arrange monitor after updating fullscreen background and lock surfaces

also update locked_bg node position in updatemons()

add blank lines to make updatemons() more readable

update comment about client_set_size() as no-op

check if a client is resizing before checking if it's visible

It's not like it's noticeable, but theoretically this is faster

only mark pending resizes as completed checking the configure serial

do not skip frames if a client is stopped and have a pending resize

Revert "Revert "fix flickering when resizing/spawning windows""

This reverts commit 4a32293548667e68cd9a103e22368b8db1754deb.