fix(richtext-lexical, ui): opening relationship field with appearance: "drawer" inside rich text inline block

[GermanJablo]

To reproduce this bug, insert the following feature into the richtext editor:

BlocksFeature({
  inlineBlocks: [
    {
      slug: 'inline-media',
      fields: [
        {
          name: 'media',
          type: 'relationship',
          relationTo: ['media'],
          admin: {
            appearance: 'drawer',
          },
        },
      ],
    },
  ],
}),

Then try opening the relationship field drawer. The inline block drawer will close.

Note: Interestingly, at least in Chrome, this only happens with DevTools closed. It worked fine with DevTools open. It probably has to do with capturing events like focus.
The current solution is a 50ms delay. I couldn't test it with CPU throttle because it disappears when I close the devtools. If you encounter this bug, please open an issue so we can increase the delay or, better yet, find a more elegant solution.

[github-actions]

🚀 This is included in version v3.40.0