support scroll from scss

Author: 任庆伟

src/shared/components/challenge-listing/Filters/FiltersPanel/style.scss

@@ -28,6 +28,7 @@ $panel-radius-4: $corner-radius * 2;
     right: 0;
     background: $tc-white;
     padding: 15px;
+    overflow-y: scroll;
   }
 
   &.hidden {
@@ -85,6 +86,7 @@ $panel-radius-4: $corner-radius * 2;
       width: 100%;
       padding-left: 0;
       border-left: none;
+      margin-bottom: $panel-space-100;
     }
 
     button {