Add deactivation modal

[timotei-litespeed]

Add survey modal on plugin deactivation.
In multisite will show the modal just in main site.

[szepeviktor]

WordPress core lacks a template engine.
I would introduce a very tiny engine to build HTML.
e.g. https://github.com/szepeviktor/SentencePress/tree/master/src/Html
( ?>"<? looks like ASCII art)

[hi-hai]

True. Can consider a generic tpl engine like smart template if needed. Can just keep as is for current templates as long as we resolved the syntax format checker reports.

[szepeviktor]

$modal = new SzepeViktor\SentencePress\Html\Element(
    'div',
    [],
    'The Content'
);

$modal_classes = [
    'litespeed',
    'litespeed-modal',
];
if (isset($_progress) && $_progress) {
    $modal_classes[] = 'litespeed-progress';
}
$modal->setAttribute('class', implode(' ', $modal_classes));

if ($_id) {
    $modal->setAttribute('id', $_id);
}

print $modal->render();

[hi-hai]

@timotei-litespeed Uninstall shouldn't be called in deactivation.

[hi-hai]

@timotei-litespeed What is this func for?

[timotei-litespeed]

@hi-hai The function is used to delete all settings that are related to LSCWP.

[hi-hai]

I see nowhere it is used.