applets/batterymonitor: Add "Manually block sleep and screen locking" to context menu
As with: plasma-nm!149 (merged) bluedevil!95 (merged) I'd like to add a context menu item for the "Manually block sleep and screen locking" header item.
This issue is a reminder for me to look into this, for consistency with other applets. I believe I hit a roadblock earlier attempting this with the state of the checkbox being lost on shell restarts (likely a bug) - so I need to look into ensuring this state is picked up by the applet to start with, and how blocking technically works, probably overhauling it.
If this isn't appropriate for the issue tracker (I believe this is tracking development), please close.