Avoid wikify widget in TOC macro

Fixing the most egregious problem from #3517

@pmario can you kindly retest?

core/modules/widgets/qualify.js

@@ -0,0 +1,66 @@
+/*\
+title: $:/core/modules/widgets/qualify.js
+type: application/javascript
+module-type: widget
+
+Qualify text to a variable 
+
+\*/
+(function(){
+
+/*jslint node: true, browser: true */
+/*global $tw: false */
+"use strict";
+
+var Widget = require("$:/core/modules/widgets/widget.js").widget;
+
+var QualifyWidget = function(parseTreeNode,options) {
+	this.initialise(parseTreeNode,options);
+};
+
+/*
+Inherit from the base widget class
+*/
+QualifyWidget.prototype = new Widget();
+
+/*
+Render this widget into the DOM
+*/
+QualifyWidget.prototype.render = function(parent,nextSibling) {
+	this.parentDomNode = parent;
+	this.computeAttributes();
+	this.execute();
+	this.renderChildren(parent,nextSibling);
+};
+
+/*
+Compute the internal state of the widget
+*/
+QualifyWidget.prototype.execute = function() {
+	// Get our parameters
+	this.qualifyName = this.getAttribute("name");
+	this.qualifyText = this.getAttribute("text");
+	// Set context variable
+	if(this.qualifyName) {
+		this.setVariable(this.qualifyName,this.qualifyText + "-" + this.getStateQualifier());
+	}
+	// Construct the child widgets
+	this.makeChildWidgets();
+};
+
+/*
+Selectively refreshes the widget if needed. Returns true if the widget or any of its children needed re-rendering
+*/
+QualifyWidget.prototype.refresh = function(changedTiddlers) {
+	var changedAttributes = this.computeAttributes();
+	if(changedAttributes.name || changedAttributes.text) {
+		this.refreshSelf();
+		return true;
+	} else {
+		return this.refreshChildren(changedTiddlers);
+	}
+};
+
+exports.qualify = QualifyWidget;
+
+})();

core/wiki/macros/toc.tid

@@ -32,9 +32,7 @@ tags: $:/tags/Macro
 
 \define toc-linked-expandable-body(tag,sort:"",itemClassFilter,exclude,path)
 <!-- helper function -->
-<$wikify name="toc-state" text="""
-  <$macrocall $name="qualify" title={{{ [[$:/state/toc]addsuffix<__path__>addsuffix[-]addsuffix<currentTiddler>] }}} />
-""">
+<$qualify name="toc-state" text={{{ [[$:/state/toc]addsuffix<__path__>addsuffix[-]addsuffix<currentTiddler>] }}}>
   <$set name="toc-item-class" filter=<<__itemClassFilter__>> emptyValue="toc-item" value="toc-item-selected">
     <li class=<<toc-item-class>>>
     <$link>
@@ -55,14 +53,12 @@ tags: $:/tags/Macro
     </$reveal>
     </li>
   </$set>
-</$wikify>
+</$qualify>
 \end
 
 \define toc-unlinked-expandable-body(tag,sort:"",itemClassFilter:" ",exclude,path)
 <!-- helper function -->
-<$wikify name="toc-state" text="""
-  <$macrocall $name="qualify" title={{{ [[$:/state/toc]addsuffix<__path__>addsuffix[-]addsuffix<currentTiddler>] }}} />
-""">
+<$qualify name="toc-state" text={{{ [[$:/state/toc]addsuffix<__path__>addsuffix[-]addsuffix<currentTiddler>] }}}>
   <$set name="toc-item-class" filter=<<__itemClassFilter__>> emptyValue="toc-item" value="toc-item-selected">
     <li class=<<toc-item-class>>>
       <$reveal type="nomatch" state=<<toc-state>> text="open">
@@ -82,7 +78,7 @@ tags: $:/tags/Macro
       </$reveal>
     </li>
   </$set>
-</$wikify>
+</$qualify>
 \end
 
 \define toc-expandable-empty-message()
@@ -102,9 +98,7 @@ tags: $:/tags/Macro
 \end
 
 \define toc-linked-selective-expandable-body(tag,sort:"",itemClassFilter:" ",exclude,path)
-<$wikify name="toc-state" text="""
-  <$macrocall $name="qualify" title={{{ [[$:/state/toc]addsuffix<__path__>addsuffix[-]addsuffix<currentTiddler>] }}} />
-""">
+<$qualify name="toc-state" text={{{ [[$:/state/toc]addsuffix<__path__>addsuffix[-]addsuffix<currentTiddler>] }}}>
   <$set name="toc-item-class" filter=<<__itemClassFilter__>> emptyValue="toc-item" value="toc-item-selected" >
     <li class=<<toc-item-class>>>
       <$link>
@@ -127,13 +121,11 @@ tags: $:/tags/Macro
       </$reveal>
     </li>
   </$set>
-</$wikify>
+</$qualify>
 \end
 
 \define toc-unlinked-selective-expandable-body(tag,sort:"",itemClassFilter:" ",exclude,path)
-<$wikify name="toc-state" text="""
-  <$macrocall $name="qualify" title={{{ [[$:/state/toc]addsuffix<__path__>addsuffix[-]addsuffix<currentTiddler>] }}} />
-""">
+<$qualify name="toc-state" text={{{ [[$:/state/toc]addsuffix<__path__>addsuffix[-]addsuffix<currentTiddler>] }}}>
   <$set name="toc-item-class" filter=<<__itemClassFilter__>> emptyValue="toc-item" value="toc-item-selected">
     <li class=<<toc-item-class>>>
       <$list filter="[all[current]tagging[]limit[1]]" variable="ignore" emptyMessage="<$button class='tc-btn-invisible'>{{$:/core/images/blank}}</$button> <$view field='caption'><$view field='title'/></$view>">
@@ -155,7 +147,7 @@ tags: $:/tags/Macro
       </$reveal>
     </li>
   </$set>
-</$wikify>
+</$qualify>
 \end
 
 \define toc-selective-expandable-empty-message()