Has some problems when custom toolbar

There are no changes when I custom toolbar using toolbar option setting in editorOption.modules

`editorOption: {
  modules: {
    toolbar: [
      [{ header: [1, false] }],
      ['image']
    ]
  }
}`

There always show all default buttons in the toolbar.

I holp it can support custom toolbar. Maybe there are some bugs when merge custom options with default options.