erp5_web_renderjs_ui: html5_select: event option for notifyChange added. needs for determine event.type on parent gadget

i need it because use span for displaying icons in json form

Thanks to Vincent Bechu for his work on this topic.

Based on Abilian repository: https://github.com/abilian/pyodide-olapy

This reverts commit b3ff3ec4.

Fetch usage can be bypassed to do not use service worker when not needed.

As appcache has been dropped on Firefox, this change will improve the speed on Firefox.

No change is expected on Chrome/Safari.

Allow edition in the new UI

This make everything slow as hell and prevent to quickly save.

For example, testReceiptRecoginition employs numpy matrix calculation methods
that try to utilize all the CPU in the computer. This behavior is harmlfull
when there are several testReciptRecongnition is running in a testnode which
has 40 CPUs.

To get the listbox cell value : code was getting last proxy target
instead of browsing the full proxy target stack.

/bug #20190111-1F86B7B
https://nexedijs.erp5.net/#/bug_module/20190111-1F86B7B

/reviewed-on nexedi/erp5!856

We randomly have unkilled firefox process remaining. Make sure
to kill them.

/bug #20190204-1BF3A5A
https://nexedijs.erp5.net/#/bug_module/20190204-1BF3A5A

/reviewed-on nexedi/erp5!848