Fix "Results boosted by LBC" wrapping unnecessarily

ui/page/discover/view.jsx

@@ -183,7 +183,7 @@ function DiscoverPage(props: Props) {
   }, [isAuthenticated]);
 
   return (
-    <Page noFooter fullWidthPage={tileLayout}>
+    <Page noFooter fullWidthPage={tileLayout} className="main__discover">
       <Ads type="homepage" />
       <ClaimListDiscover
         pins={getPins(dynamicRouteProps)}

ui/scss/component/_main.scss

@@ -1134,6 +1134,14 @@ body {
   max-width: 32rem;
 }
 
+.main__discover {
+  .section__actions--no-margin {
+    @media (max-width: $breakpoint-small) {
+      width: unset; // It was being set to '100%' globally. Not sure why.
+    }
+  }
+}
+
 .main-wrapper--scrollbar {
   // The W3C future standard; currently supported by Firefox only.
   // It'll hopefully auto fallback to this when 'webkit-scrollbar' below is deprecated in the future.