Improvement: config registration form settings (#3932)

* wip

* wip

* i18n en-us

* phpcs fixes

* wip i18n

* wip i18n

* i18n ignore en-us

* delete registration.help

* i18n de

* JS Syntax fixed for config.js

* JavaScript lint fixes config.js

* fix typo in i18n/de

* improve the JS

* improve HTML

* phpcs fixes

* update main.js from edge

* fix i18n comments

* Update app/i18n/fr/admin.php

Co-authored-by: Alexandre Alapetite <alexandre@alapetite.fr>

p/scripts/config.js

@@ -0,0 +1,56 @@
+// @license magnet:?xt=urn:btih:0b31508aeb0634b347b8270c7bee4d411b5d4109&dn=agpl-3.0.txt AGPL-3.0
+'use strict';
+
+function init_selectInputChanger() {
+	const select = document.getElementsByClassName('select-input-changer');
+
+	for (let i = 0; i < select.length; i++) {
+		select[i].addEventListener('change', updateSelectInput);
+		select[i].dispatchEvent(new Event('change', {
+			bubbles: true,
+			cancelable: true,
+		}));
+	}
+}
+
+function updateSelectInput(ev) {
+	const elem = ev.target;
+	const formGroup = document.getElementById(elem.dataset.name + '-block');
+	const input = document.getElementById(elem.dataset.name + '-input');
+	if (elem.selectedOptions[0].dataset.inputVisible == 'false') {
+		formGroup.style.display = 'none';
+		input.name = '';
+		elem.name = elem.dataset.name;
+	} else {
+		formGroup.style.display = '';
+		input.name = elem.dataset.name;
+		elem.name = '';
+	}
+}
+
+function init_maxNumbersOfAccountsStatus() {
+	const input = document.getElementById('max-registrations-input');
+	if (input) {
+		input.addEventListener('change', onchange_maxNumbersOfAccounts);
+		input.dispatchEvent(new Event('change', {
+			bubbles: true,
+			cancelable: true,
+		}));
+	}
+}
+
+function onchange_maxNumbersOfAccounts(ev) {
+	const elem = ev.target;
+	if (elem.value > elem.dataset.number) {
+		document.getElementById('max-registrations-status-disabled').style.display = 'none';
+		document.getElementById('max-registrations-status-enabled').style.display = '';
+	} else {
+		document.getElementById('max-registrations-status-disabled').style.display = '';
+		document.getElementById('max-registrations-status-enabled').style.display = 'none';
+	}
+}
+
+init_selectInputChanger();
+init_maxNumbersOfAccountsStatus();
+
+// @license-end