[App] Fix of untranslated first document's name (#7156)

* Change no need function newDocument("Unnamed") call to variant without parameter. "Unnamed" set in App newDocument function instead.
* Refactor New Document command to run without parameter.
* Translate new document's userName. Internal name = "Unnamed".
* Crowdin Add to updatets.py App.ts. Create new file App.ts
* Fix error where document name is set with one function parameter. In this situation set internal and user name to string variable. For default function call (without parameter) set internal name to Unnamed, userName = translate ("Unnamed")

src/Mod/Import/App/AppImportPy.cpp

@@ -159,7 +159,7 @@ private:
                 pcDoc = App::GetApplication().getDocument(DocName);
             }
             if (!pcDoc) {
-                pcDoc = App::GetApplication().newDocument("Unnamed");
+                pcDoc = App::GetApplication().newDocument();
             }
 
             Handle(XCAFApp_Application) hApp = XCAFApp_Application::GetApplication();