Merge branch '39-visualization-of-two-overlaying-drugs' into 'master'

Resolve "visualization of two overlaying drugs"

Closes #39

See merge request piotr.gawron/minerva!187

frontend-js/src/main/js/map/marker/AbstractMarker.js

@@ -62,7 +62,7 @@ AbstractMarker.prototype.getIcon = function () {
     //if we have many identical icons then return this specific icon
     for (var i = 1; i < icons.length; i++) {
       if (icons[i] !== result) {
-        return "marker/generic/search_green.png";
+        return "marker/multi.png";
 
       }
     }