Improving search popover on mobile

web/sass-files/sass/partials/_responsive.scss

@@ -284,6 +284,10 @@
             height: auto;
         }
     }
+    .popover.search-help-popover {
+        width: 262px;
+        margin: 34px 0 0 14px;
+    }
     .modal-direct-channels {
         .member-count {
             float: none;