Sidebar overflow on xs side.

app/assets/stylesheets/framework/sidebar.scss

@@ -27,8 +27,14 @@
   }
 
   &.right-sidebar-expanded {
+    @media (max-width: $screen-sm-max) {
+      padding-right: 0;
+    }
+    @media (min-width: $screen-sm-min) {
       padding-right: $gutter_width;
     }
+    
+  }
 }
 
 .sidebar-wrapper {

app/assets/stylesheets/pages/issuable.scss

@@ -173,12 +173,6 @@
 
     .gutter-toggle {
       border-left: 1px solid $border-gray-light;
-      @media (max-width: $screen-sm-max) {
-        display: none;
-      }
-      @media (min-width: $screen-sm-min) {
-        display: block
-      }
     }
   }