Pasting a table from Excel Online with Paste from Office includes CSS as part of pasted content

[lkszzajac]

📝 Provide detailed reproduction steps (if any)

1. Open an Excel sheet in Office Online (e.g. example sheet from the Enhanced Paste demo
2. Copy the contents and paste them in an editor with Paste from Office (not Enhanced) plugin enabled.

✔️ Expected result

A table with default styles is created.

❌ Actual result

The table is created, but the associated CSS is also pasted as text above the table.

📃 Other details

• Browser: n/a
• OS: n/a
• First affected CKEditor version: found in 44.2.0
• Installed CKEditor plugins: Paste from Office

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