Add image overlay to News page
User story; as a user I would like to click on an image and see the enlarged version to ensure I see detail captured in the image.
https://kotahi.community/news/
Acceptance criteria;
- Ability to hover over the new item image, see a cursor and 'Click to enlarge' tooltip.
- clicking on the image opens the same image up in an overlay.
- Clicking outside on the overlay window and/or on 'cancel' should close the window.
- Overlay window is responsive.