tightened unit treeview styles

cms/static/sass/_content-types.scss

@@ -5,6 +5,7 @@
   padding-left: 14px;
   background-position: 8px center;
   background-repeat: no-repeat;
+  vertical-align: middle;
 }
 
 .videosequence-icon {

cms/static/sass/_unit.scss

@@ -382,6 +382,11 @@
   .window-contents > ol {
     @include tree-view;
 
+    .section-item {
+      font-size: 11px;
+      padding: 2px 8px 4px 16px;
+    }
+
     ol {
       .section-item {
         padding-left: 30px;