Introduce common.js in settings pages

tools/cdata.js

@@ -116,7 +116,8 @@ async function minify(str, type = "plain") {
   } else if (type == "css-minify") {
     return new CleanCSS({}).minify(str).styles;
   } else if (type == "js-minify") {
-    return await minifyHtml('<script>' + str + '</script>', options).replace(/<[\/]*script>/g, '');
+    let js = await minifyHtml('<script>' + str + '</script>', options);
+    return js.replace(/<[\/]*script>/g, '');
   } else if (type == "html-minify") {
     return await minifyHtml(str, options);
   }
@@ -252,6 +253,12 @@ writeChunks(
         str
           .replace("%%", "%")
     },
+    {
+      file: "common.js",
+      name: "JS_common",
+      method: "gzip",
+      filter: "js-minify",
+    },
     {
       file: "settings.htm",
       name: "PAGE_settings",