Fix SASS deprecations

Author: federicobucchi

assets/stylesheets/_screen.scss

@@ -505,21 +505,21 @@ footer[role="contentinfo"] {
     max-width: 700px;
 
     i {
-      &.twitter {
-        background-image: url("/assets/images/icon-twitter.svg");
-      }
-
-      &.feed {
-        background-image: url("/assets/images/icon-feed.svg");
-      }
-
       width: 16px;
       height: 16px;
       background-repeat: no-repeat;
       background-size: 16px;
       display: block;
       margin-left: 1em;
       float: right;
+
+      &.twitter {
+        background-image: url("/assets/images/icon-twitter.svg");
+      }
+
+      &.feed {
+        background-image: url("/assets/images/icon-feed.svg");
+      }
     }
   }
 }

assets/stylesheets/pages/_swift-evolution.scss

@@ -151,11 +151,12 @@
   }
 
   #status-filter-subhead {
+    line-height: 1rem;
+    margin-bottom: 1.3rem;
+
     &.hidden {
       display: none;
     }
-    line-height: 1rem;
-    margin-bottom: 1.3rem;
   }
 
   #status-filter-description {