make the user agent header field name stay at the top of the line when the user agent wraps.

rs=sspitzer

mailnews/base/resources/content/mailWidgets.xml

@@ -35,7 +35,7 @@
        use headerValue to set the header value. -->
   <binding id="mail-headerfield">
     <content>
-      <xul:hbox class="headerBox" inherits="orient" align="center" flex="1">
+      <xul:hbox class="headerBox" inherits="orient" align="start" flex="1">
         <xul:hbox class="headerValueBox">
           <xul:label class="headerdisplayname plain" inherits="value=label"/>  
         </xul:hbox>