Reverting center channel margins and fixing the channel names (#2823)

Fixing margin for channel intro

Adjusting margins for preformatted text

webapp/sass/layout/_headers.scss

@@ -67,7 +67,7 @@
 
 .channel-intro {
     border-bottom: 1px solid $light-gray;
-    margin: 0 30px 35px;
+    margin: 0 18px 35px;
     padding: 0 0 5px;
 
     .intro-links {
@@ -289,7 +289,8 @@
 
         &:first-child {
             border-left: none;
-            padding-left: 1em;
+            padding-left: 15px;
+            padding-right: 1em;
             text-align: left !important;
             width: 100%;
         }
@@ -315,7 +316,7 @@
         font-size: 1.3em;
         font-weight: 600;
         margin: 0 4px 0 0;
-        max-width: calc(100% - 50px);
+        max-width: 100%;
         overflow: hidden;
         text-overflow: ellipsis;
         vertical-align: middle;

webapp/sass/layout/_markdown.scss

@@ -29,8 +29,8 @@
     pre {
         border: 1px solid rgba(221,221,221,0.2);
         border-radius: .25em;
-        margin: 0;
+        margin: 5px 0;
-        padding: 0px;
+        padding: 0;
         text-align: left;
     }
 

webapp/sass/layout/_navigation.scss

@@ -72,10 +72,10 @@
                 color: $white;
                 display: inline-block;
                 font-weight: 600;
-                margin-right: 3px;
+                margin-right: 5px;
+                max-width: calc(100% - 200px);
                 overflow: hidden;
                 vertical-align: top;
-                width: calc(100% - 200px);
             }
 
             .header-dropdown__icon {

webapp/sass/layout/_post.scss

@@ -359,7 +359,7 @@ body.ios {
 .post-create__container {
     form {
         margin: 0 auto;
-        padding: .5em 30px 0;
+        padding: .5em 15px 0;
         width: 100%;
     }
 
@@ -604,7 +604,7 @@ body.ios {
     .post__content {
         display: table;
         margin: 0 auto;
-        padding: 0 15px;
+        padding: 0 5px;
         position: relative;
         table-layout: fixed;
         width: 100%;