Provide keyboard navigation for base windows menus

menus/win32.cson

@@ -1,6 +1,6 @@
 'menu': [
   {
-    label: 'File'
+    label: '&File'
     submenu: [
       { label: 'New Window', command: 'application:new-window' }
       { label: 'New File', command: 'application:new-file' }
@@ -22,7 +22,7 @@
   }
 
   {
-    label: 'Edit'
+    label: '&Edit'
     submenu: [
       { label: 'Undo', command: 'core:undo' }
       { label: 'Redo', command: 'core:redo' }
@@ -83,7 +83,7 @@
   }
 
   {
-    label: 'View'
+    label: '&View'
     submenu: [
       { label: 'Reload', command: 'window:reload' }
       { label: 'Toggle Full Screen', command: 'window:toggle-full-screen' }
@@ -102,7 +102,7 @@
   }
 
   {
-    label: 'Selection'
+    label: '&Selection'
     submenu: [
       { label: 'Add Selection Above', command: 'editor:add-selection-above' }
       { label: 'Add Selection Below', command: 'editor:add-selection-below' }
@@ -121,7 +121,7 @@
   }
 
   {
-    label: 'Movement'
+    label: '&Movement'
     submenu: [
       { label: 'Move to Top', command: 'core:move-to-top' }
       { label: 'Move to Bottom', command: 'core:move-to-bottom' }
@@ -138,17 +138,17 @@
   }
 
   {
-    label: 'Find'
+    label: 'F&ind'
     submenu: []
   }
 
   {
-    label: 'Packages'
+    label: '&Packages'
     submenu: []
   }
 
   {
-    label: 'Window'
+    label: '&Window'
     submenu: [
       { label: 'Minimize', command: 'application:minimize' }
       { label: 'Zoom', command: 'application:zoom' }
@@ -158,7 +158,7 @@
   }
 
   {
-    label: 'Help'
+    label: '&Help'
     submenu: [
       { label: 'About Atom', command: 'application:about' }
       { label: "VERSION", enabled: false }