[stable15] Reset and init new user form language (#17652)

[stable15] Reset and init new user form language

Author: skjnldsv

.drone.yml

@@ -83,7 +83,8 @@ steps:
 - name: handlebars
   image: node
   commands:
-    - npm install handlebars -g
+    # we use 4.1.0 in our build folder
+    - npm install handlebars@4.1.0 -g
     - ./build/compile-handlebars-templates.sh
 
 trigger:

apps/workflowengine/lib/Check/FileMimeType.php

@@ -83,7 +83,7 @@ public function setFileInfo(IStorage $storage, $path) {
 	 * @param string $mimeType
 	 * @return string
 	 */
-	protected function cacheAndReturnMimeType(string $storageId, ?string $path, string $mimeType): string {
+	protected function cacheAndReturnMimeType(string $storageId, string $path, string $mimeType): string {
 		if ($path !== null && $this->storage->file_exists($path)) {
 			$this->mimeType[$storageId][$path] = $mimeType;
 		}