Set minimum height for message headers block (#1489108)

skins/larry/mail.css

@@ -913,6 +913,10 @@ div.hide-headers {
 	border-radius: 3px;
 }
 
+#messageheader .message-headers {
+	min-height: 60px;
+}
+
 #messageheader #contactphoto {
 	display: block;
 	position: absolute;

skins/larry/templates/message.html

@@ -44,7 +44,9 @@
 <span class="moreheaderstoggle"></span>
 
 <h2 class="subject"><roundcube:object name="messageHeaders" valueOf="subject" /></h2>
+<div class="message-headers">
 <roundcube:object name="messageHeaders" class="headers-table" addicon="/images/addcontact.png" exclude="subject" max="20" />
+</div>
 <roundcube:object name="messageFullHeaders" id="full-headers" />
 
 <!-- record navigation -->