Disable tabbing completely. The user defaults hack isn't sufficient because holding down option causes a new window to open as a tab. Issue 6197

Avoid profile divorce for restoreCursor (discovered in the debug log for issue 5344). Add logging for first responder changes for issue 5344.

Merge in code from hotkeyWindowsInPanels branch. Support multiple hotkey windows. Update the shortcut input view. Add support for floating panel terminal windows.