[Web] Add html2text converter; Show quarantaine html elements as text, do not escape html

data/web/inc/lib/vendor/composer/ClassLoader.php

@@ -379,9 +379,9 @@ class ClassLoader
                 $subPath = substr($subPath, 0, $lastPos);
                 $search = $subPath.'\\';
                 if (isset($this->prefixDirsPsr4[$search])) {
+                    $pathEnd = DIRECTORY_SEPARATOR . substr($logicalPathPsr4, $lastPos + 1);
                     foreach ($this->prefixDirsPsr4[$search] as $dir) {
-                        $length = $this->prefixLengthsPsr4[$first][$search];
-                        if (file_exists($file = $dir . DIRECTORY_SEPARATOR . substr($logicalPathPsr4, $length))) {
+                        if (file_exists($file = $dir . $pathEnd)) {
                             return $file;
                         }
                     }