adding chemical drug icon

Author: fabregat

src/main/java/org/reactome/web/pwp/client/details/tabs/molecules/model/data/Molecule.java

@@ -86,6 +86,8 @@ public ImageResource getImageResource() {
                 return DatabaseObjectImages.INSTANCE.entityWithAccessionedSequence();
             case SIMPLE_ENTITY:
                 return DatabaseObjectImages.INSTANCE.simpleEntity();
+            case CHEMICAL_DRUG:
+                return DatabaseObjectImages.INSTANCE.chemicalDrug();
             case GENOME_ENCODED_ENTITY:
                 return DatabaseObjectImages.INSTANCE.genomeEncodeEntity();
             case OTHER_ENTITY: