Add a file properties dialog

Task-number: QTCREATORBUG-19588
Change-Id: I75599459beb7e23812ba48670ae968585faefda9
Reviewed-by: Eike Ziller <eike.ziller@qt.io>
Reviewed-by: Tobias Hunger <tobias.hunger@qt.io>

src/plugins/coreplugin/documentmanager.h

@@ -123,6 +123,7 @@ public:
                                      const QString &alwaysSaveMessage = QString(),
                                      bool *alwaysSave = nullptr,
                                      QList<IDocument *> *failedToClose = nullptr);
+    static void showFilePropertiesDialog(const Utils::FileName &filePath);
 
     static QString fileDialogLastVisitedDirectory();
     static void setFileDialogLastVisitedDirectory(const QString &);