Resolve #3425363 "Accessibility mobile usability improvments"
requested to merge issue/media_pixabay-3425363:3425363-accessibility-mobile-usability-improvments into 3.0.x
Updates:
- Add tabindex to images to enable tabbing through search result images and selecting them with Enter
- Add aria attributes to keyboard accessible elements
- Reduce left and right margin on content
- Update display of submit button to increase contrast