[Diary] Edit Diary has same content after change of date

[UnmeshPadhye]

🐛 Describe the bug

Need to clear the editor after the diary is saved, or the date is changed

⚠️ Current behavior

Content stays the same in editor

✔️ Expected behavior

Clearning the editor to default placeholder text every time we change the date or save the diary

🪜 Steps to reproduce

📷 Screenshots

📱 Tech info

• Name of the sample:
• Latest repo commit:
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