When running Xephyr, its window title says "ctrl-shift grabs mouse and keyboard".
I am using ctrl-shift (left ctrl - left shift) as keyboard layout switching hotkeys and it interferes with Xephyr, when I press them, just the keyboard layout is switched, Xephyr doesn't grab mouse and keyboard.
I strongly want to avoid changing the hotkey combination for keyboard layout switching.
Is it possible to change the default hotkeys for mouse/keyboard grabbing in Xephyr?
Ideally, I would like a VirtualBox-like behavior: Xephyr window would grab mouse and keyboard when I mouse click on it and would release mouse and keyboard when I press the right ctrl. If this is is not possible, I'm open to alternative suggestions which will keep left ctrl - left shift for keyboard layout switching only.
EDIT: I'm having troubles with releasing the bounty to the accepted answer in ff4 + noscript addon with superuser.com being whitelisted. To make it not look like a scam attempt I hereby authorize any SU user with enough rep to release the bounty for me if this is possible.