Fix Shift key modifier in Cocoa backend

TODO.FACTOR.txt

@@ -7,8 +7,6 @@
   - clicking input doesn't resize editor gadget
   - better listener multi-line expression handling
   - C+p/C+n with empty history bombs
-- shift modifier not delivered
-- x11 copy to clipboard
 
 - httpd search tools
 - remaining HTML issues need fixing
@@ -24,6 +22,7 @@
 
 + ui:
 
+- support x11's large selections, if needed
 - one-column table doesn't need borders...?
 [2:45pm] tathi: Factor's text display is a bit odd sometimes, until you mouse over (or click, if there's no "live" text)
 [2:48pm] tathi: it appears to be using the font metrics from the sprite tuple, but re-using the texture from the previous letter

library/ui/cocoa/view-utils.factor

@@ -34,7 +34,7 @@ opengl sequences ;
 
 : modifiers
     {
-        { S+ HEX: 10000 }
+        { S+ HEX: 20000 }
         { C+ HEX: 40000 }
         { A+ HEX: 80000 }
         { M+ HEX: 100000 }