use DBUS to reload KWIN or PlasmaShell

reload-plasmashell.sh

#!/bin/bash
[ "$XDG_SESSION_DESKTOP" = "KDE" ] || exit
#dbus-send --session --print-reply --dest=org.kde.kded5 \
#          /kded \
#          org.kde.kded5.unloadModule \
#          string:"kscreen"
{
  dbus-send --session --type=method_call --print-reply  --dest=org.kde.plasmashell /PlasmaShell org.kde.PlasmaShell.refreshCurrentShell  ||
  { killall plasmashell -u ${USER:-$(whoami)} && echo killed plasmashell ; kstart5 -- plasmashell  >/dev/null 2>&1 & }
} &
{ 
  dbus-send --session --type=signal --print-reply  --dest=org.kde.KWin /KWin org.kde.KWin.reloadConfig ||
  { kstart5 -- kwin_x11 --replace  >/dev/null 2>&1 & }
} &
#killall spectacle