[tree] styling fix for tree (on graph view especially)

dist/styles/Graph.css

@@ -16,8 +16,8 @@
 #graph-explorer .graph-tree {
   position: absolute;
   max-height: 600px;
-  overflow-y: scroll;
   top: 170px;
+  background-color: #fff;
   z-index: 1;
 }
 #graph-explorer #graph-view {
@@ -26,13 +26,11 @@
 #graph-explorer #sp-container {
   position: absolute;
   max-height: 600px;
-  overflow-y: scroll;
   top: 170px;
-  z-index: 1;
   border: 1px white solid;
   background-color: white;
   left: 70%;
-  width: 30%;
+  width: 28%;
 }
 #graph-explorer #sp-container #myTab {
   marginBottom: 18px;

dist/styles/Graph.sass

 @mixin sidePanelCommon
   position: absolute
   max-height: 600px
-  overflow-y: scroll
+  //overflow-y: scroll
   top: 170px
-  z-index: 1
+  //z-index: 1
 
 #graph-explorer
   #toolbar
@@ -22,6 +22,8 @@
 
   .graph-tree
     @include sidePanelCommon
+    background-color: #fff
+    z-index: 1
 
   #graph-view
     height: 95%
@@ -31,7 +33,7 @@
     border: 1px white solid
     background-color: white
     left: 70%
-    width: 30%
+    width: 28%
 
     #myTab
       marginBottom: 18px