--- a/stlviewer.css	Tue Apr 04 00:47:22 2017 +0200
+++ b/stlviewer.css	Tue Apr 04 03:13:58 2017 +0200
@@ -31,7 +31,7 @@
   #sortable1, #sortable2 {
     border: 1px solid #eee;
     width: 142px;
-    min-height: 20px;
+    /*min-height: 20px;*/
     list-style-type: none;
     margin: 0;
     padding: 5px 0 0 0;
@@ -48,7 +48,11 @@
 
 .listcontainer {
   width: 157px;
-  height: 300px;
-  overflow-y: scroll;
+  height: 500px;
+  overflow-y: auto;
   overflow-x: hidden;
+  float: left;
+}
+.listcontainer ul {
+  min-height: 420px;
 }
\ No newline at end of file