Broken lockscreen on multi-monitor setup

[jake770321]

Description

Lock screen is easily bypassed by switching off the main monitor in a multi monitor setup

Budgie version

10.6.4

Operating system

Solus 4.3 Fortitude

Steps to reproduce the issue

1. Have 2 monitors plugged in and switched on.
2. Lock the screen
3. Turn off the main monitor.

Actual result

Lock screen is now bypassed on the 2nd monitor.

Expected result

Screen should stay locked regardless of monitor setup