builder.js: multi-germline menu on two lines, starting from IGH

browser/css/vidjil.less

@@ -141,6 +141,10 @@ line {
     display: inline-block;
 }
 
+.info_row_content {
+    display: inline-block;
+}
+
 #info_point {
     margin-top: 15px;
 }

browser/js/builder.js

@@ -616,9 +616,18 @@ Builder.prototype = {
         span1.className = "info_row"
         
         var span2 = document.createElement('span');
+        span2.className = "info_row_content"
         
+        var keys = 0 ;
+
         for (var key in this.m.system_segmented) {
             
+            if (key == "IGH" && keys > 0) {
+                span2.appendChild(document.createElement("br"));
+            }
+
+            keys += 1 ;
+
             var checkbox=document.createElement("input");
                 checkbox.type="checkbox";
                 checkbox.id = "checkbox_system_"+key