Features and shortcomings of html5

[hh]

Forgot to say:

**** There are a LOT of improvements in the HTML5 standalone builder from
LC 8.0.2 to 9.0.0-dp10. ****
It is especially Ian who does a good job in that field.

But it is also a lot of work to recompile older standalones and to
remove work arounds that are no longer needed.
Probably it is best to remove all old examples.

It is the same with widgets. LCB changes are very sparsely documented.
Instead of being angry that 'old widgets' don't run any more just remove them.