refs #226 Adds a shortcut which focuses the note

lib/main-menu.js

@@ -59,6 +59,13 @@ var file = {
         mainWindow.webContents.send('top:new-note')
       }
     },
+    {
+      label: 'Focus Note',
+      accelerator: 'Control + E',
+      click: function () {
+        mainWindow.webContents.send('detail:focus')
+      }
+    },
     {
       type: 'separator'
     },