style(chrome-extension): update padding for popup layout with responsive design (#687)

Author: quanru

apps/chrome-extension/src/extension/popup.less

@@ -28,11 +28,15 @@ html {
   width: 100%;
   height: 100%;
   box-sizing: border-box;
-  padding: @layout-extension-space-vertical 25px 0 25px;
+  padding: 12px 12px 0;
   background: #FFF;
   display: flex;
   flex-direction: column;
 
+  @media screen and (min-width: 800px) {
+    padding: 20px 20px 0;
+  }
+
   .tabs-container {
     flex-grow: 1;
     min-height: 0;