Need option to disable automatic keyboard capturing

[Timwi]

At the moment, the behaviour of VirtualBox is frustrating in the following way:

• Press the keyboard-capture key to uncapture the keyboard
• Press Alt-Tab to switch to another app
• Press Alt-Tab to switch back to VirtualBox.

Expected behaviour: I expect to get back to the same state that I was in.

Actual behaviour: VirtualBox captures the keyboard unwantedly. I have to consciously realise that it is VirtualBox that I Alt-Tabbed to and uncapture the keyboard before I can alt-tab away from it again.

Suggested fix: Never capture the keyboard automatically. Only ever capture the keyboard when the user explicitly presses the keyboard-capture key. If the current behaviour (automatic capturing) is desirable, by all means keep it as default, but add an option to disable it.