added _preloader

Author: mychidarko

example.php

@@ -50,4 +50,9 @@
 
 $ui::render($ui::merge($ui::p("Something"), $ui::p("Here")));
 $ui::render($ui::_fragment([$ui::p("Something"), $ui::p("Here")]));
-$ui::render($ui::_preloader($ui::p("Loading...")));
+$ui::render(
+	$ui::_preloader($ui::_fragment([
+		$ui::img("./1.jpg"),
+		$ui::h2("Loading...")
+	]))
+);

src/UI.php

@@ -1113,10 +1113,11 @@ public static function _preloader($children, array $props = []) {
 					display: flex !important;
 					justify-content: center !important;
 					align-items: center !important;
+					flex-direction: column;
 					background: white;
 				",
 				"#{$props['id']} > *" => "
-					width: 100px !important;
+					width: 100px;
 				",
 				"#{$props['id']}.hidden" => "
 					animation: fadeOut 1.5s !important;