Set setting-name class to have vertical-align: middle property.

changelog.html

@@ -73,6 +73,9 @@ Upcoming changes</a>
   <li class=rfe>
     Jenkins OS X installer now starts Jenkins upon system boot, not upon user login
     (<a href="https://issues.jenkins-ci.org/browse/JENKINS-9399">issue 9399</a>)
+  <li class=rfe>
+    Improve the vertical alignment of form fields and labels
+    (<a href="https://github.com/jenkinsci/jenkins/pull/175">pull request #175</a>)
 </ul>
 </div><!--=TRUNK-END=-->
 

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

@@ -244,6 +244,7 @@ pre.console {
 
 .setting-name {
   white-space: nowrap;
+  vertical-align: middle;
 }
 
 .setting-main {