Hot Corner: Add action "Lock & Suspend"

[marbetschar]

Prerequisites

• I have searched open and closed issues for duplicates.

Feature

It would be awesome to have a native option for "Suspend" for a Hot Corner. I quite often use this, because I use my Laptop in office spaces, where I don't want anyone be able to glimpse on my screen while I'm away.

For now I'm using the Custom command systemctl suspend as workaround - and to fix going to sleep mode again after unlocking, I'm also moving the cursor position before suspending (installed an extra tool for this): sh -c "xdotool mousemove 500 500 && systemctl suspend"

EDIT: Updated workaround command to also deactivate the Screen.
EDIT 2: Changed "Lock Screen" to "Suspend", because this behaves as intended: It locks the session, deactivates the screen and then goes to sleep mode to save battery.