Improve modularity of web components

[ianthetechie]

Right now the web frontend has basically all logic wrapped in a single component and it's not very easy to bring your own behaviors like manual step advance or routes fetched elsewhere. We should factor out the logic from the component into a separate class as on other platforms.

[sahil-idk]

@ianthetechie I would like to work on this issue , is this resolved internally or needs to be worked upon

[ianthetechie]

Nobody is working on it at the moment, but feel free to start a discussion here if you you've some suggestions!

Note that #395 will likely make some improvements to this. But further modularity will require some deeper expertise in how to best structure web components. Happy to discuss any ideas you have.