Clean up headers

Updates headers to match style guide and makes them consistent
throughout pages in the GUI. Removes instances where a header
element existed and a different header style was being applied.
For example, <h2 class="h4">

Tested: Ran GUI locally and verified that headers look consistent
and have the appropriate sizing while using Chrome, Firefox and
Safari.

Change-Id: I187136298ed2bfd36c40c2b80d5a4f20947cbe56
Signed-off-by: beccabroek <beccabroek@gmail.com>
diff --git a/app/server-control/controllers/server-led-controller.html b/app/server-control/controllers/server-led-controller.html
index dba6923..2901d76 100644
--- a/app/server-control/controllers/server-led-controller.html
+++ b/app/server-control/controllers/server-led-controller.html
@@ -2,7 +2,7 @@
     <div class="row column">
         <h1>Server LED</h1>
         <div class="page-header">
-            <h2 class="h4">LED light control</h2>
+            <h2>LED light control</h2>
         </div>
     </div>