Make shift+wheel behaves as shift+Prev/Next

St uses a very good hack where mouse wheel genereates ^Y and ^E,
that are the same keys that less and vi uses for backward and
fordward scrolling. Scroll, as many terminal emulators, use
shift+Prev/Next for scrolling, but it is also using ^E and ^Y
for scroling, characters that are reserved in the POSIX shell
in emacs mode for end of line and yanking, making scroll unsable
in st.

This patch adds a new hack, making shift+wheel returning the
same sequences than shift+Prev/Next, meaning that scroll or
any other similar program will not be able to differentiate
between them.

config.def.h

@@ -263,6 +263,9 @@ static MouseShortcut mshortcuts[] = {
 	#if SCROLLBACK_MOUSE_PATCH
 	{ ShiftMask,            Button4, kscrollup,      {.i = 1} },
 	{ ShiftMask,            Button5, kscrolldown,    {.i = 1} },
+	#else
+	{ ShiftMask,            Button4, ttysend,        {.s = "\033[5;2~"} },
+	{ ShiftMask,            Button5, ttysend,        {.s = "\033[6;2~"} },
 	#endif // SCROLLBACK_MOUSE_PATCH
 	#if SCROLLBACK_MOUSE_ALTSCREEN_PATCH
 	{ XK_NO_MOD,            Button4, kscrollup,      {.i = 1} },
@@ -271,7 +274,6 @@ static MouseShortcut mshortcuts[] = {
 	{ XK_ANY_MOD,           Button4, ttysend,        {.s = "\031"} },
 	{ XK_ANY_MOD,           Button5, ttysend,        {.s = "\005"} },
 	#endif // SCROLLBACK_MOUSE_ALTSCREEN_PATCH
-
 };
 
 #if SCROLLBACK_MOUSE_ALTSCREEN_PATCH