Fixed PNG serving issue and added new external link icon
diff --git a/asterix-app/src/main/resources/webui/static/css/style.css b/asterix-app/src/main/resources/webui/static/css/style.css
index 6bfd18f..df12b4d 100644
--- a/asterix-app/src/main/resources/webui/static/css/style.css
+++ b/asterix-app/src/main/resources/webui/static/css/style.css
@@ -157,8 +157,9 @@
     color: #17265a;
 }*/
 
-i {
+.extarget {
     margin-left: 4px;
+    padding-bottom: 2px;
 }
 
 .btn-custom-darken.active {