fix(blocks): slash menu not closable in peek view

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Name	Status	Preview	Comments	Updated (UTC)
blocksuite	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Jul 2, 2024 3:36pm

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| Name | Status | Preview | Comments | Updated (UTC) | | :--- | :----- | :------ | :------- | :------ | | **blocksuite-docs** | ⬜️ Ignored ([Inspect](https://vercel.com/toeverything/blocksuite-docs/9ZnhxbzL9e1SFALhPhhW8cERHCVj)) | [Visit Preview](https://blocksuite-docs-git-07-02-fixblocksslashmen-ab8d6e-toeverything.vercel.app) | | Jul 2, 2024 3:36pm |

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[pengx17]

• #7478 👈
• master

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Merge activity

• Jul 2, 11:33 AM EDT: pengx17 added this pull request to the Graphite merge queue.
• Jul 2, 11:45 AM EDT: pengx17 merged this pull request with the Graphite merge queue.