Pass previous operator to afterUpdateRuleOperator event

[giero]

Added previousOperator to 'afterUpdateRuleOperator' event - could be useful in some cases ;)

[mistic100]

Could also do it for afterUpdateRuleFilter, afterUpdateRuleValue and afterUpdateGroupCondition ? (these needs to update the method calls on core.js lines 285 and 300)

[giero]

I'm on it, but ... updateRuleValue is called also in updateRuleOperator function (just after afterUpdateRuleOperator event) - what should be passed there?
New updateRuleValue will look like this

QueryBuilder.prototype.updateRuleValue = function(rule, oldValue) {
...
}

but updateRuleOperator doesn't change the rule value ... so ... undefined?

EDIT: Well - it changes value in one case:

if (!rule.operator || rule.operator.nb_inputs === 0) { ... }

so I will copy value of rule.__.value before it changes and pass this value to the updateRuleValue function.

[giero]

@mistic100 Is it enough to merge?

[mistic100]

There is a pending review.

[mistic100]

@giero there is still a pending review

[mistic100]

you can just use rule.value, __ is only useful to set the value without triggering an update event

[mistic100]

@giero Sorry the review was not published, I didn't see it because the behavior changed some months ago

[giero]

@mistic100
I've changed what you suggested.
It's only few lines of code - why review last so long?