Achilleas Kiritsakas

When an untitled document is saved the repl session is ending. Let's keep the session alive when the file is saved if the file extension is supported.

At the moment the aliases are partly supported. Consider adding similar support with [webpack's modules](https://webpack.js.org/configuration/resolve/#resolvemodules)

On svelte assets with .svelte extension, the lines are not correct, maybe the error is on sourcemaps

When the dom plugin is enabled in react apps, the history runs before it, so it recognizes that no dom is available. At the moment user needs to delete the...