Improved slightly error pages, Added card's corner triangular button

Update .gitignore, 403.php, and 7 more files...

commons/modals.php

@@ -0,0 +1,38 @@
+<?php
+// Making sure the file is included and not accessed directly.
+if(basename(__FILE__) == basename($_SERVER["SCRIPT_FILENAME"])) {
+	header('HTTP/1.1 403 Forbidden');
+	die();
+}
+
+function get_modal_id(string $id): string {
+	return "modal-".$id;
+}
+
+function add_code_modal(string $id, string $title, string $text) {
+	echo('<div class="modal" id="'.get_modal_id($id).'" tabindex="-1" role="dialog">
+	<div class="modal-dialog" role="document">
+		<div class="modal-content p-0">
+			<a href="#" class="close" role="button" aria-label="Close">
+				<span aria-hidden="true"><i class="fad fa-times"></i></span>
+			</a>
+			<h5 class="modal-title my-10 text-center">'.$title.'</h5>
+			<hr class="my-15">
+			<div class="card p-0 m-0 bg-very-dark mx-15">
+				<p id="modal-text-'.$id.'" class="text-monospace mx-15">'.$text.'</p>
+			</div>
+			<div class="text-right text-center my-15">
+				<a href="#" class="btn mr-20" role="button">'.localize("generic.button.close").'</a>
+				<a href="#" class="btn btn-primary disabled" role="button">'.localize("generic.button.copy").'</a>
+			</div>
+		</div>
+	</div>
+</div>');
+}
+
+?>
+
+
+
+
+