Admin user access stock images from Magento Media Gallery

[sidolov]

Description

• Add button to the Media Gallery slide out panel. Button caption: "Search Adobe Stock"
• Implement Slide out panel that opens by click on the "Search Adobe Stock" button

Documentation

Story: User accesses stock images from Magento Admin
App Design Document: Adobe Stock Image Search Design

QA notes

• Button "Search Adobe Stock" is present on the Media Gallery slide out panel
• Admin user has the ability to open Adobe Stock slide out panel
• Admin user has the ability to close Adobe Stock slide out panel