Adding option to display channels sanely (#2761)

webapp/sass/layout/_post.scss

@@ -359,11 +359,14 @@ body.ios {
 .post-create__container {
     form {
         margin: 0 auto;
-        max-width: 1028px;
-        padding: .5em 14px 0;
+        padding: .5em 30px 0;
         width: 100%;
     }
 
+    .center {
+        max-width: 1028px;
+    }
+
     .post-create-body {
         padding: 0 0 2px;
         position: relative;
@@ -607,10 +610,10 @@ body.ios {
     .post__content {
         display: table;
         margin: 0 auto;
-        max-width: 1000px;
         position: relative;
         table-layout: fixed;
         width: 100%;
+        padding: 0 15px;
 
         > div {
             display: table-cell;
@@ -618,6 +621,10 @@ body.ios {
         }
     }
 
+    .center {
+        max-width: 1000px;
+    }
+
     .post__header {
         list-style: none;
         margin-bottom: 2px;