Placeholders: Fixup clicking on placeholder after previous change

Now that the name in the db is the name of the placeholder file,
we need to adjust the call to downloadPlaceholder

src/gui/application.cpp

@@ -684,15 +684,15 @@ void Application::openPlaceholder(const QString &filename)
         qWarning(lcApplication) << "Can only handle file ending in .owncloud. Unable to open" << filename;
         return;
     }
-    QString normalName = filename.left(filename.size() - placeholderExt.size());
     auto folder = FolderMan::instance()->folderForPath(filename);
     if (!folder) {
         qWarning(lcApplication) << "Can't find sync folder for" << filename;
         // TODO: show a QMessageBox for errors
         return;
     }
-    QString relativePath = QDir::cleanPath(normalName).mid(folder->cleanPath().length() + 1);
+    QString relativePath = QDir::cleanPath(filename).mid(folder->cleanPath().length() + 1);
     folder->downloadPlaceholder(relativePath);
+    QString normalName = filename.left(filename.size() - placeholderExt.size());
     auto con = QSharedPointer<QMetaObject::Connection>::create();
     *con = QObject::connect(folder, &Folder::syncFinished, [con, normalName] {
         QObject::disconnect(*con);

src/gui/application.h

@@ -75,6 +75,7 @@ public slots:
     void slotCrash();
     /**
      * Will download a placeholder file, and open the result.
+     * The argument is the filename of the placeholder file (including the extension)
      */
     void openPlaceholder(const QString &filename);
 

src/gui/folder.h

@@ -280,6 +280,7 @@ public slots:
 
     /**
      * Mark a placeholder as being ready for download, and start a sync.
+     * relativePath is the patch to the placeholder file (includeing the extension)
      */
     void downloadPlaceholder(const QString &relativepath);