Added navigation menus to general links.

In this change, I've added it to various links in the list view to get
the sense of how it feels like.

core/src/main/resources/hudson/views/JobColumn/column.jelly

@@ -25,6 +25,6 @@ THE SOFTWARE.
 <?jelly escape-by-default='true'?>
 <j:jelly xmlns:j="jelly:core" xmlns:st="jelly:stapler" xmlns:d="jelly:define" xmlns:l="/lib/layout" xmlns:t="/lib/hudson" xmlns:f="/lib/form" xmlns:i="jelly:fmt">
     <td style="${indenter.getCss(job)}">
-        <a href="${jobBaseUrl}${job.shortUrl}" tooltip="${job.name}"> ${job.displayName}</a>
+        <a href="${jobBaseUrl}${job.shortUrl}" class='model-link'> ${job.displayName}</a>
     </td>
 </j:jelly>
\ No newline at end of file

core/src/main/resources/hudson/views/LastFailureColumn/column.jelly

@@ -29,7 +29,7 @@ THE SOFTWARE.
     <j:choose>
       <j:when test="${lfBuild!=null}">
         ${lfBuild.timestampString}
-        (<a href="${jobBaseUrl}${job.shortUrl}lastFailedBuild/">${lfBuild.displayName}</a>)
+        (<a href="${jobBaseUrl}${job.shortUrl}lastFailedBuild/" class="model-link">${lfBuild.displayName}</a>)
       </j:when>
       <j:otherwise>
         ${%N/A}

core/src/main/resources/hudson/views/LastStableColumn/column.jelly

@@ -29,7 +29,7 @@ THE SOFTWARE.
     <j:choose>
       <j:when test="${lstBuild!=null}">
         ${lstBuild.timestampString}
-        (<a href="${jobBaseUrl}${job.shortUrl}lastStableBuild/">${lstBuild.displayName}</a>)
+        (<a href="${jobBaseUrl}${job.shortUrl}lastStableBuild/" class="model-link">${lstBuild.displayName}</a>)
       </j:when>
       <j:otherwise>
         ${%N/A}

core/src/main/resources/hudson/views/LastSuccessColumn/column.jelly

@@ -29,7 +29,7 @@ THE SOFTWARE.
     <j:choose>
       <j:when test="${lsBuild!=null}">
         ${lsBuild.timestampString}
-        (<a href="${jobBaseUrl}${job.shortUrl}lastSuccessfulBuild/">${lsBuild.displayName}</a>)
+        (<a href="${jobBaseUrl}${job.shortUrl}lastSuccessfulBuild/" class="model-link">${lsBuild.displayName}</a>)
       </j:when>
       <j:otherwise>
         ${%N/A}

core/src/main/resources/lib/layout/breadcrumbs.js

@@ -19,39 +19,45 @@ var breadcrumbs = (function() {
       menu = new YAHOO.widget.Menu("breadcrumb-menu", {position:"dynamic", hidedelay:1000});
     });
 
-    jenkinsRules["#breadcrumbs LI"] = function (e) {
-        // when the mouse hovers over LI, activate the menu
-        $(e).observe("mouseover", function () {
-            function showMenu(items) {
-                menu.hide();
-                menu.cfg.setProperty("context", [e, "tl", "bl"]);
-                menu.clearContent();
-                menu.addItems(items);
-                menu.render("breadcrumb-menu-target");
-                menu.show();
-            }
+    function handleHover(e) {
+        function showMenu(items) {
+            menu.hide();
+            menu.cfg.setProperty("context", [e, "tl", "bl"]);
+            menu.clearContent();
+            menu.addItems(items);
+            menu.render("breadcrumb-menu-target");
+            menu.show();
+        }
+
+        if (xhr)
+            xhr.options.onComplete = function () {
+            };   // ignore the currently pending call
+
+        if (e.items) {// use what's already loaded
+            showMenu(e.items());
+        } else {// fetch menu on demand
+            xhr = new Ajax.Request(e.getAttribute("href") + "contextMenu", {
+                onComplete:function (x) {
+                    var a = x.responseText.evalJSON().items;
+                    a.each(function (e) {
+                        e.text = makeMenuHtml(e.icon, e.displayName);
+                    });
+                    e.items = function() { return a };
+                    showMenu(a);
+                }
+            });
+        }
 
-            if (xhr)
-                xhr.options.onComplete = function () {
-                };   // ignore the currently pending call
+        return false;
+    }
 
-            if (e.items) {// use what's already loaded
-                showMenu(e.items());
-            } else {// fetch menu on demand
-                xhr = new Ajax.Request(e.firstChild.getAttribute("href") + "contextMenu", {
-                    onComplete:function (x) {
-                        var a = x.responseText.evalJSON().items;
-                        a.each(function (e) {
-                            e.text = makeMenuHtml(e.icon, e.displayName);
-                        });
-                        e.items = function() { return a };
-                        showMenu(a);
-                    }
-                });
-            }
+    jenkinsRules["#breadcrumbs LI"] = function (e) {
+        // when the mouse hovers over LI, activate the menu
+        $(e).observe("mouseover", function () { handleHover(e.firstChild) });
+    };
 
-            return false;
-        });
+    jenkinsRules["A.model-link"] = function (a) {
+        $(a).observe("mouseover", function () { handleHover(a); });
     };
 
     /**