ENH BaseElement::getType() use static::class instead of __CLASS__ for…

… better defaults

Without this then the default is always the singular name of `BaseElement` ('Block'). This allows each subclass to have a more sensible default based on `$singular_name`.

src/Models/BaseElement.php

@@ -441,7 +441,7 @@ public function getType()
     {
         $default = $this->i18n_singular_name() ?: 'Block';
 
-        return _t(__CLASS__ . '.BlockType', $default);
+        return _t(static::class . '.BlockType', $default);
     }
 
     /**