Demo record, cam_2, cam_3 not functioning correctly

[yohjimane]

Describe the bug
Caused by regression in this commit: 84f09c5

Can be fixed by adding this line back: 84f09c5#diff-8c9a94aa05d6fc560256f64b35bdde19e45da565a0d3998750c9f2f15d504bfdL399

When activating demo_record command, input keys don't work correctly until pressing period key.

When activating cam_2 / cam_3 keybinds, camera stays in static position while actor can still move around.

To Reproduce
Steps to reproduce the behavior:

1. Activate demo_record, cam_2 or cam_3
2. Observe camera functionality doesn't work the same as before this commit: 84f09c5

Expected behavior
When using demo_record, you should be able to move the camera around using wasd, spacebar keys and left/right mouse buttons.

When using cam_2/cam_3, camera should follow the actor and be affected by mouse movement.