Support images in map result formats

[Rudloff]

Setup

• Maps version: 5.6
• MW version: 1.31.1
• PHP version: 7.0.30-0+deb9u1
• SMW version (if applicable): 3.0.0-rc.2

Issue

When a page has an image property, it is possible to display it in a list of results when using formats like table.
However, it is not possible to do the same thing when displaying results as a Leaflet map. The map marker popup does not display the image.

Here is an example: https://sandbox.semantic-mediawiki.org/wiki/Issue/M/479

[JeroenDeDauw]

Thanks for reporting and creating the example!

Two questions you can answer to make it easier to fix this:

• Is this specific to Leaflet?
• Is this specific to SMW results or also in display_map?

[Rudloff]

• It also does not work wit Google Maps. (I updated the sandbox to show that as well.)
• It is possible to add an image to the popup content with display_map (but the result is a bit buggy).

[JeroenDeDauw]

Thanks for testing!