refactors + support for onAdminCompilePresetSCSS() event

classes/plugin/ScssList.php

@@ -0,0 +1,31 @@
+<?php
+namespace Grav\Plugin\Admin;
+
+class ScssList {
+    protected $list= [];
+
+    public function __construct($item = null)
+    {
+        if ($item) {
+            $this->add($item);
+        }
+    }
+
+    public function all()
+    {
+        return $this->list;
+    }
+
+    public function add($item)
+    {
+        $this->list[] = $item;
+    }
+
+    public function remove($item)
+    {
+        if (in_array($item)) {
+            unset($item);
+        }
+    }
+
+}