Minor UI improvements (#3095)

Updating config.json

Updating config.json

Updating config.json

Updating config.json

webapp/sass/layout/_headers.scss

@@ -67,9 +67,9 @@
 
 .channel-intro {
     border-bottom: 1px solid $light-gray;
-    padding: 0 0 5px;
-    max-width: 1000px;
-    margin: auto;
+    margin: 0 auto 15px;
+    max-width: 990px;
+    padding: 0 15px;
 
     .intro-links {
         display: inline-block;