Modified handling of history menu selection and go-forward, go-back actions so that, if Ctrl key is pressed, selected history item in displayed in new tab.
This implements feature request #3559378 (http://bit.ly/NPtEkX).
Authored by: delphidabbler 2012-08-19
Parent: [r2254]
Child: [r2256]
