docs: Clearify automatic-control explanation

[ermshiperete]

The code walkthrough mentions

As you can see above, the second line in the code snippet above references the LaoKey keyboard loader JavaScript file.

However, it's not clear which line is meant: probably not the comment (<!-- Start of Code -->). The second line of the actual script (kmw.init().then(function() {)? Doesn't have anything about Laos keyboard. It's pretty confusing and non-obvious. It might be good to quote the line/part of the line that this sentence refers to.

https://help.keyman.com/DEVELOPER/ENGINE/WEB/15.0/guide/examples/automatic-control

[mcdurdin]

The whole web engine guide needs rewriting, as it is based on KeymanWeb 1.0. It really needs a total rethink.