The source project of this merge request has been removed.
Merged requested to merge (removed):change-screen-lock-strings into main
The strings related to screen blank are long and cumbersome.
This MR makes these strings shorter, following the advice from: #1433 (comment 1607990)
Also, this MR adds a subtitle for the "Automatic Screen Lock" row.
Since the issue #1433 (closed) was already fixed with the GTK 4 port, I didn't add the issue link to the commit message.