Make tag for menubar-contents dropdown configurable (#4983)

* Make tag for menubar-contents dropdown configurable

* Make tag for menubar-contents dropdown configurable

* Make tag for menubar-contents dropdown configurable

plugins/tiddlywiki/menubar/config-TableOfContentsTag.tid

@@ -0,0 +1,2 @@
+title: $:/config/plugins/menubar/TableOfContents/Tag
+text: TableOfContents

plugins/tiddlywiki/menubar/config.tid

@@ -26,6 +26,12 @@ The breakpoint position between narrow and wide screens. Should include CSS unit
 
 <$edit-text tiddler="$:/config/plugins/menubar/breakpoint" default="" tag="input"/>
 
+!! Contents Tag
+
+The tag for the ~TableOfContents used in the Contents dropdown
+
+<$edit-text tiddler="$:/config/plugins/menubar/TableOfContents/Tag" default="" tag="input"/>
+
 !! Menu Bar Colours
 
 To change the colour of the menu bar, define the colours `menubar-foreground` and `menubar-background` in the currently selected palette

plugins/tiddlywiki/menubar/items/contents.tid

@@ -6,6 +6,6 @@ tags: $:/tags/MenuBar
 
 <div class="tc-table-of-contents">
 
-<<toc-selective-expandable 'TableOfContents'>>
+<$macrocall $name="toc-selective-expandable" tag={{$:/config/plugins/menubar/TableOfContents/Tag}}/>
 
 </div>