Update highlights on editor lines accordingly to the user modifications of the text

[emilioSp]

This is a usability issue.

The monaco editor demands to the user the updates on lines highlights

[ioggstream]

In the old editor, I limited the re-validation rate at 1/5seconds. You could just warn the user with an icon stating that he needs to revalidate (eg. set the auto-validate button to red...)

[emilioSp]

It sounds good. Adding @Fupete for visibility.

[ioggstream]

The "validation required" icon/color should be set:

• when text is altered
• when the ruleset is changed

[Fupete]

I imagine we are talking about situations with "Auto refresh" off, right? Preliminary ideas:

1. use an alert (https://italia.github.io/bootstrap-italia/docs/componenti/alert) and at the same time anim/blink the button in some way to be more visible;
2. change the text in the button from "Validate" to "Need to re-validate" or something like that and change its color (or blink/anim)
3. ... I will think better about it next days.