Improve application reloading in development mode

[andersevenrud]

This was brought up in https://community.os-js.org/t/how-to-update-hot-reload-application/519/4.

The current implementation is not very reliable. Something in the chain fails (or does not happen), which currently is:

1. Server watches the dist folder
2. A change occurs and the watcher catches the file path
3. This action is debounced
4. A broadcast with the changed package name occurs
5. The client retrieves the broadcast event and restarts the application by name