More work

theme/blockly.less

@@ -116,6 +116,10 @@ span.blocklyTreeIcon.blocklyTreeIconaddpackage::before {
     content: "\f105";
 }
 
+span.blocklyTreeIcon.blocklyTreeIconadvancedcollapsed::before {
+    content: "\f116";
+}
+
 .save-editortools-btn .icon.save::before {
     content: "\f115"
 }