Porygon Theme compatible with 7.1

• Type: Story
• Status: Closed
• Priority: Minor
• Resolution: Completed
• Affects Version/s: None
• Fix Version/s: 7.1.X, Master
• Component/s: Themes > Porygon
• Labels: None
• Epic Link: Productive Modular Frontend
• Sprint: S01E11 - Airplane!
• Git Pull Request: https://github.com/brianchandotcom/liferay-portal/pull/58486

Modify the Porygon Theme to make it compatible with 7.1 version.