wayland: improved config by adding local config

.config/wayland/wayland.conf

@@ -3,7 +3,8 @@ exec systemctl --user import-environment WAYLAND_DISPLAY XDG_CURRENT_DESKTOP &
 exec dbus-update-activation-environment --systemd WAYLAND_DISPLAY XDG_CURRENT_DESKTOP &
 nmcli radio wifi on &
 
-~/.config/wayland/swayidle.sh &
+[ -f "${HOME}/.config/wayland/swayidle.sh" ] && . "${HOME}/.config/wayland/swayidle.sh" &
+[ -f "${HOME}/.config/wayland/wayland-local.conf" ] && . "${HOME}/.config/wayland/wayland-local.conf" &
 
 $STATUSBAR &                            # use environment variable
 xss-lock -- swaylock &                  # enable locking the screen upon sleep
@@ -23,7 +24,6 @@ signal-desktop &
 Telegram &
 threema-beta &
 thunderbird &
-# mattermost-desktop &
 
 # monitor toggle &
 # touchpad off &