Fix the spacing around some <h3> headers

src/root/build.tt

@@ -150,7 +150,7 @@
 		
 		[% IF build.buildproducts %]
 
-			<h2>Build products</h2>
+			<h3>Build products</h3>
 		
 			[% IF !available %]
 			  <p class="error">Note: this build is no longer available.</p>
@@ -170,8 +170,7 @@
 			[% END %]
 
             [% IF prevSuccessfulBuild %]
-            <h2>Changes</h2>
-            <br/> 
+            <h3>Changes</h3>
             <table class="table table-striped table-condensed">
                 <thead>
                     <th>Last successful build <tt>[% INCLUDE renderDateTime timestamp = prevSuccessfulBuild.timestamp %]</tt></th>

src/root/jobset.tt

@@ -122,7 +122,7 @@
 	
 		[% IF jobset.errormsg -%]
 		<div id="tabs-errors" class="tab-pane">
-		  <h3>Evaluation errors</h3>
+		  <h2>Evaluation errors</h2>
 		  <pre class="multiLineMsg error">[% HTML.escape(jobset.errormsg) %]</pre>
 		</div>
 		[% END %]

src/root/static/css/hydra.css

@@ -16,3 +16,7 @@ th {
 .template {
     display: none;
 }
+
+h3 {
+    margin-top: 1em;
+}