title: vscode reopen always last session
body: <p>vscode (1.18) reopen always last session, i have set <code>"window.restoreWindows": "none"</code> but seems not work, my settings:</p>
  
  <pre><code>{
      "window.menuBarVisibility": "toggle",
      "files.autoSave": "onFocusChange",
      "workbench.startupEditor": "none",
      "window.newWindowDimensions": "inherit",
      "editor.fontFamily": "Ubuntu mono",
      "editor.fontSize": 15,
      "workbench.editor.showTabs": true,
      "window.zoomLevel": 0,
      "explorer.openEditors.visible": 0,
      "workbench.iconTheme": "vscode-icons",
      "editor.wrappingIndent": "same",
      "editor.wordWrap": "on",
      "workbench.colorTheme": "Monokai",
      "window.restoreWindows": "none"
  }
  </code></pre>
  
  <p>any idea?</p>