Wizard reworked

[MartkCz]

Sessions are managed by WizardSessionSection. Steps are in StepCounter.

Values are now two-dimensional (returned from Wizard::getRawValues()):

[
    step => values
]

Wizard::getValues() returns merged array (from Wizard::getRawValue()) and cleaned of skipped steps.

Total steps is determined without form creation.

Wizard now checks if submitted form is current form.

Added methods getPresenter() and startup().

Can make optional step with:

protected function startup(): void
{
    $this->skipStepIf(2, function (array $values): bool {
        return isset($values[1]) && $values[1]['skip'];
    });
}

Fixed #10, #9

[vanam]

Any update?

[vanam]

@MartkCz I took your PR and finished it. Please take a look #27. Thx

[f3l1x]

27 merged