GUACAMOLE-5: Clean up header and dropdown style.

guacamole/src/main/webapp/app/index/styles/headers.css

@@ -32,7 +32,7 @@ h2 {
     font-size: 1.25em;
     font-weight: bold;
     text-transform: uppercase;
-    padding: 0.75em 0.5em;
+    padding: 0.5em;
     margin: 0;
 }
 
@@ -90,7 +90,7 @@ h2 {
 
 .header .filter {
     margin: 0;
-    padding: 0.75em 0.5em;
+    padding: 0.5em;
 }
 
 .header .filter input {