POWL: General usability issues in powl UI screens

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Symptom
POWL UI screen issues:
1. In ‘Personalize’ screen, the ‘Delete Query’ popup has no ‘Close’ button
2. In ‘Personalize’ screen, on ‘Add Category’ both ‘OK’ and ‘Close’ buttons are default buttons. Only ‘OK’ button should be default button.
3. In ‘Personalize’ screen, on ‘Rename Query’ both ‘OK’ and ‘Close’ buttons are default buttons. Only ‘OK’ button [...]