Closes #815 - fixes no alignment styles for media and text block.

calm-business/sass/blocks/_blocks.scss

@@ -867,7 +867,7 @@
 		background-color: $color__background-body-dark;
 		color: $color__text-light;
 		position: relative;
-		margin: 0;
+		margin: 0 auto;
 		@include media(tablet) {
 			&:before {
 				content: '';

calm-business/style.css

@@ -4432,7 +4432,7 @@ body.page .main-navigation {
   background-color: #6C6C74;
   color: #fff;
   position: relative;
-  margin: 0;
+  margin: 0 auto;
 }
 
 @media only screen and (min-width: 768px) {