F map marker color config

Summary

Minimal enhancement to make the marker colors configurable (for the entities on the map) as requested per caosdb/customers/leibniz-zmt/management#127

Focus

Leaflet has a particular data structure (DivIcon_options) for the configuration of the map markers. We just use that and read it out from the config.

Test Environment

Use a normal map.json configuration and merge it with

{
    "entityLayers": {
        "current_page_entities": {
            "icon_options": {
                "html": "<i class=\"bi-geo-alt-fill\"  style=\"font-size: 20px; color: teal;\"></i>"
            }
        },
        "all_map_entities": {
            "icon_options": {
                "html": "<i class=\"bi-geo-alt-fill\"  style=\"font-size: 20px; color: brown;\"></i>"
            }
        }
    }
}  

You should now see the icons in brown and teal, instead of red and blue.

Check List for the Author

Please, prepare your MR for a review. Be sure to write a summary and a focus and create gitlab comments for the reviewer. They should guide the reviewer through the changes, explain your changes and also point out open questions. For further good practices have a look at our review guidelines

• All automated tests pass
• Reference related issues
• Up-to-date CHANGELOG.md (or not necessary)
• Annotations in code (Gitlab comments)
  • Intent of new code
  • Problems with old code
  • Why this implementation?

Check List for the Reviewer

• I understand the intent of this MR
• All automated tests pass
• Up-to-date CHANGELOG.md (or not necessary)
• The test environment setup works and the intended behavior is reproducible in the test environment
• In-code documentation and comments are up-to-date.
• Check: Are there specifications? Are they satisfied?

For further good practices have a look at our review guidelines.

src/doc/extension/query_templates.rst

@@ -192,7 +192,7 @@ The following example for the file global_query_shortcuts.json would create two
         {
             "description": "Show a table of Experiments for year: {year}",
             "query": "SELECT date, project, identifier FROM Record Experiment with date in {year}"
-        },
+        }
     ]
 
 Data Model for User Query Templates