Host-Q and Host-H do not follow host key remapping

[reidpr]

Steps to reproduce:

1. Change host key from default (command) to left control + left option.
2. Start a guest (I have a Debian Linux guest).
3. Type Command-Q.

Expected behavior:

• Keystroke is passed through to guest.

Actual behavior:

• Keystroke is intercepted by VirtualBox (which offers to quit).
• After cancelling the quit dialog, the Command key is stuck down until it's pressed again.

Misc:

• Basically, this is a user interface bug. Following the principle of least surprise, all host key combinations should be remapped if the host key is changed. Also, these keystrokes are needed in the guest OS (Emacs in particular uses them frequently).
• This forum thread may be relevant: ​https://forums.virtualbox.org/viewtopic.php?f=6&t=29695

Thanks for your hard work on VirtualBox! It makes my work dramatically easier.