When using the GeoJson format, is it possible to have, e.g. in de 'description' property, a link to a Wiki page? It's not in the list with limitations (https://maps.extension.wiki/wiki/Leaflet_GeoJSON#Limitations).
Topic on Extension talk:Maps
Good question. Came here for the same feature.
So I added the feature by editing /Maps/resources/leaflet/FeatureBuilder.js
and modifying function createMarker(properties, options) with something like
if( properties.hasOwnProperty('text') && properties.text.length > 0 ) {
marker.bindPopup( '<a href="/'+ properties.title+'>'+properties.text+'</a>' );
}