Fixes webview source maps

Author: eamodio

webpack.config.js

@@ -200,7 +200,7 @@ function getUIConfig(env) {
             // main: ['./scss/main.scss']
         },
         mode: env.production ? 'production' : 'development',
-        devtool: !env.production ? 'source-map' : undefined,
+        devtool: !env.production ? 'eval-source-map' : undefined,
         output: {
             filename: '[name].js',
             path: path.resolve(__dirname, 'dist/ui'),