Add nav.toc class to style navigation

Per dita-ot/dita-ot#3801

Signed-off-by: Roger Sheen <roger@infotexture.net>

Author: infotexture

css/custom.css

@@ -1,5 +1,5 @@
 /* Highlight current topic in bold */
-nav[role='navigation'] li.active > a {
+nav.toc li.active > a {
   font-weight: bold;
 }
 

xsl/html5-bootstrap.xsl

@@ -88,8 +88,8 @@
   <!-- Override `nav.xsl` to add Bootstrap classes -->
   <xsl:template match="*" mode="gen-user-sidetoc">
     <xsl:if test="$nav-toc = ('partial', 'full')">
-      <!-- ↓ Add grid class to <nav>, wrap <ul> in small well <div> & add .bs-docs-sidenav class -->
-      <nav class="col-md-3" role="navigation">
+      <!-- ↓ Add grid & toc classes to <nav>, wrap <ul> in small well <div> & add .bs-docs-sidenav class -->
+      <nav class="col-md-3 toc" role="navigation">
         <div class="well well-sm">
           <ul class="bs-docs-sidenav">
             <!-- ↑ End customization -->

xsl/map2html5-cover.xsl

@@ -16,7 +16,7 @@
     <xsl:if test="descendant::*[contains(@class, ' map/topicref ')]
                                [not(@toc = 'no')]
                                [not(@processing-role = 'resource-only')]">
-      <nav class="col-md-3" role="navigation">
+      <nav class="col-md-3 toc" role="navigation">
         <div class="well well-sm">
           <ul>
             <xsl:call-template name="commonattributes">