[Fix JENKINS-13195] New Breadcrumb bar covers search suggestions

Adjust z-index for #search-box-completion to appear over the breadcrumb

changelog.html

@@ -55,6 +55,9 @@ Upcoming changes</a>
 <!-- Record your changes in the trunk here. -->
 <div id="trunk" style="display:none"><!--=TRUNK-BEGIN=-->
 <ul class=image>
+	<li class=bug>
+ 		New Breadcrumb bar covers search suggestions
+    (<a href="https://issues.jenkins-ci.org/browse/JENKINS-13195">issue 13195</a>)  
   <li class=bug>
     Fixed a log rotation portability problem on RedHat RPM package.
     (<a href="https://issues.jenkins-ci.org/browse/JENKINS-5784">issue 5784</a>)  

war/src/main/webapp/css/style.css

@@ -877,7 +877,7 @@ DIV.yahooTree td {
   text-align: left;
   width:25em;
   position: absolute;
-  z-index: 999;
+  z-index: 1000;
 }
 
 #search-box-completion .yui-ac-content {