Emulation: Fix escape sequences of F1-F4 with modifiers

https://bugzilla.gnome.org/show_bug.cgi?id=600659
Emulation: Fix escape sequences of numpad math operators with modifiers

https://bugzilla.gnome.org/show_bug.cgi?id=600659
Emulation: Fix escape sequences of Home and End, with and without modifiers

https://bugzilla.gnome.org/show_bug.cgi?id=600659
Emulation: Fix escape sequences of Begin (numpad 5) with modifiers

https://bugzilla.gnome.org/show_bug.cgi?id=600659
Emulation: Fix escape sequence of Ctrl+Alt+Space

https://bugzilla.gnome.org/show_bug.cgi?id=710349