fix(StackSync): Miscellaneous fixes for stack image sync (#3663)

platform/app/.webpack/webpack.pwa.js

@@ -131,6 +131,8 @@ module.exports = (env, argv) => {
         maximumFileSizeToCacheInBytes: 5 * 1024 * 1024,
         // Need to exclude the theme as it is updated independently
         exclude: [/theme/],
+        // Cache large files for the manifests to avoid warning messages
+        maximumFileSizeToCacheInBytes: 1024 * 1024 * 50,
       }),
     ],
     // https://webpack.js.org/configuration/dev-server/

platform/app/.webpack/writePluginImportsFile.js

@@ -74,7 +74,7 @@ function getRuntimeLoadModesExtensions(modules) {
     );
   });
   dynamicLoad.push(
-    '  return (await import(module)).default;',
+    '  return (await import(/* webpackIgnore: true */ module)).default;',
     '}\n',
     '// Import a list of items (modules or string names)',
     '// @return a Promise evaluating to a list of modules',