Some ImGui windows always block all player input even after ImGui is hidden

[mcphedar]

Describe the bug After opening the ImGUI ui and closing it, player input is blocked, requiring a restart to restore control.

Steps to reproduce Steps to reproduce the behavior:

1. open ImGUI with HOME key
2. open some of the imGUI windows, such as physx debug overlay or multiplayer desync analysis tool
3. hide imGUI with HOME key
4. keyboard/mouse input is ignored by the player controller

Expected behavior You can use the iMGUI and then close it so you can resume control of the client.

Assets required o3de-multiplayersample

[lmbr-pip]

May need o3de/o3de GHI as this may need fix in IMGui