Hi Marian.
I found a workaround for showing pictures and links in the GetFeatureInfo panel.
Simply added the full HTML code inside a layer attribute (in my case is PostgreSQL + PostGIS served through GeoServer).
Here is an example of the field (attribute) containing a link to an external image.
The field is called "imagen" and it contains the following
Then, in MapStore, edit the corresponding template for the layer, and add
${ properties.imagen}
Also, i've managed putting hyperlinks from database, adding a field called "vinculo"
This is an example content for vinculo field:
Then, in MapStore, edit the corresponding template for the layer, and add
${ properties.vinculo}
Also, i noticed that template editor supports more formatting than the toolbars offer. If You copy and paste formatted text (from MS Word for example), the template manages it.
That did the trick
(Sorry for my english)
Cheers,
Ramiro