Sort list of enabled styles in paragraphs_collection.settings alphabetically

+++ b/src/Form/StylesOverviewForm.php
@@ -193,6 +193,7 @@ class StylesOverviewForm extends ConfigFormBase {
     parent::submitForm($form, $form_state);
     $enabled_styles = array_keys(array_filter((array) $form_state->getValue('styles'), function ($value) { return !empty($value['enabled']); }));
+    sort($enabled_styles);
     $this->config->set('enabled_styles', $enabled_styles);
     $this->config->save();

Looks good, now we just need a test.

Not sure if the test is really testing this, I think we'd likely need to manually change the order and then checking that resaving the form updates it.

The fancy option would be a config save event subscriber that reorders there, then it would always happen, but seems a bit overkill. This is good enough for me.