Files app backend now normalizes paths before rendering templates

Before rendering breadcrumbs or the file list, the paths are now
normalized. This prevents the UI to show "." breadcrumbs in case the
path contains sections with "/./"

Fixes #5848

apps/files/ajax/list.php

@@ -10,7 +10,7 @@ OCP\JSON::checkLoggedIn();
 
 // Load the files
 $dir = isset( $_GET['dir'] ) ? $_GET['dir'] : '';
-
+$dir = \OC\Files\Filesystem::normalizePath($dir);
 if (!\OC\Files\Filesystem::is_dir($dir . '/')) {
 	header("HTTP/1.0 404 Not Found");
 	exit();

apps/files/index.php

@@ -36,6 +36,7 @@ OCP\Util::addscript('files', 'filelist');
 OCP\App::setActiveNavigationEntry('files_index');
 // Load the files
 $dir = isset($_GET['dir']) ? stripslashes($_GET['dir']) : '';
+$dir = \OC\Files\Filesystem::normalizePath($dir);
 // Redirect if directory does not exist
 if (!\OC\Files\Filesystem::is_dir($dir . '/')) {
 	header('Location: ' . OCP\Util::getScriptName() . '');
@@ -128,7 +129,7 @@ if ($needUpgrade) {
 	$tmpl = new OCP\Template('files', 'index', 'user');
 	$tmpl->assign('fileList', $list->fetchPage());
 	$tmpl->assign('breadcrumb', $breadcrumbNav->fetchPage());
-	$tmpl->assign('dir', \OC\Files\Filesystem::normalizePath($dir));
+	$tmpl->assign('dir', $dir);
 	$tmpl->assign('isCreatable', $isCreatable);
 	$tmpl->assign('permissions', $permissions);
 	$tmpl->assign('files', $files);