Splitup darwin menu from others to make it more clear what's going on

src/main/menus/app.js

@@ -9,6 +9,25 @@ var createTemplate = function(mainWindow) {
   var template = [];
 
   const platformAppMenu = process.platform === 'darwin' ? [{
+    label: 'About ' + app_name,
+    role: 'about',
+    click: function(item, focusedWindow) {
+      electron.dialog.showMessageBox(mainWindow, {
+        buttons: ["OK"],
+        message: `${app_name} Desktop ${electron.app.getVersion()}`
+      });
+    }
+  }, {
+    type: 'separator'
+  }, {
+    label: 'Preferences...',
+    accelerator: 'CmdOrCtrl+,',
+    click: function(item, focusedWindow) {
+      mainWindow.loadURL('file://' + __dirname + '/browser/settings.html');
+    }
+  }, {
+    type: 'separator'
+  }, {
     label: 'Hide ' + app_name,
     accelerator: 'Command+H',
     selector: 'hide:'
@@ -21,25 +40,33 @@ var createTemplate = function(mainWindow) {
     selector: 'unhideAllApplications:'
   }, {
     type: 'separator'
-  }] : [];
+  }, {
+    label: 'Quit ' + app_name,
+    accelerator: 'CmdOrCtrl+Q',
+    click: function(item, focusedWindow) {
+      electron.app.quit();
+    }
+  }] : [{
+    label: 'Settings',
+    accelerator: 'CmdOrCtrl+,',
+    click: function(item, focusedWindow) {
+      mainWindow.loadURL('file://' + __dirname + '/browser/settings.html');
+    }
+  }, {
+    type: 'separator'
+  }, {
+    label: 'Quit',
+    accelerator: 'CmdOrCtrl+Q',
+    click: function(item, focusedWindow) {
+      electron.app.quit();
+    }
+  }];
 
   template.push({
     label: '&' + first_menu_name,
-    submenu: [{
-      label: (process.platform === 'darwin') ? 'Preferences...' : 'Settings',
-      accelerator: 'CmdOrCtrl+,',
-      click: function(item, focusedWindow) {
-        mainWindow.loadURL('file://' + __dirname + '/browser/settings.html');
-      }
-    }, {
-      type: 'separator'
-    }, ...platformAppMenu, {
-      label: 'Quit',
-      accelerator: 'CmdOrCtrl+Q',
-      click: function(item, focusedWindow) {
-        electron.app.quit();
-      }
-    }]
+    submenu: [
+      ...platformAppMenu
+    ]
   });
   template.push({
     label: '&Edit',