JENKINS-70169 Restore link to last breadcrumb (jenkinsci#7539)

Author: timja

core/src/main/resources/lib/layout/breadcrumb.jelly

@@ -43,7 +43,7 @@ THE SOFTWARE.
   </st:documentation>
 
   <j:if test="${mode=='breadcrumbs'}">
-    <j:set var="hasLink" value="${!(attrs.href == null or h.hyperlinkMatchesCurrentPage(attrs.href))}" />
+    <j:set var="hasLink" value="${attrs.href != null}" />
     <li id="${attrs.id}" class="jenkins-breadcrumbs__list-item" aria-current="${hasLink ? null : 'page'}">
       <j:choose>
         <j:when test="${!hasLink}">

core/src/main/resources/lib/layout/breadcrumbBar.jelly

@@ -47,7 +47,7 @@ THE SOFTWARE.
         <j:if test="${h.isModel(anc.object) and anc.prev.url!=anc.url}">
           <j:set var="mode" value="breadcrumbs" />
           <l:breadcrumb title="${anc.object == app ? '%Dashboard' : anc.object.displayName}"
-                        href="${contents.length() == 0 and (index == request.ancestors.size() - 1) ? null : anc.url + '/'}"
+                        href="${anc.url}/"
                         hasMenu="${h.isModelWithContextMenu(anc.object)}" />
           <j:choose>
             <j:when test="${h.isModelWithChildren(anc.object)}">