Status: Use vertical-align for progress bar instead of margin

This way the progress bar is always aligned with the change id
on the left. Right now this renders exactly the same, but it
seems easier to maintain.

Change-Id: I73c0bf59f9243eb4194f5235275dd68eedb4b404
diff --git a/etc/status/public_html/styles/zuul.css b/etc/status/public_html/styles/zuul.css
index e833f4b..44fd737 100644
--- a/etc/status/public_html/styles/zuul.css
+++ b/etc/status/public_html/styles/zuul.css
@@ -16,7 +16,9 @@
 .zuul-change-total-result {
     height: 10px;
     width: 100px;
-    margin: 5px 0 0 0;
+    margin: 0;
+    display: inline-block;
+    vertical-align: middle;
 }
 
 .zuul-spinner,