Add QML folder in project tree, show files there

Use the full path for folders to sort in the project tree.

For virtual folders ensure that the path ensures the sorting we want.

Reviewed-By: kkoehne

src/plugins/genericprojectmanager/genericprojectnodes.cpp

@@ -208,6 +208,14 @@ bool GenericProjectNode::removeFiles(const ProjectExplorer::FileType fileType,
     return m_project->removeFiles(filePaths);
 }
 
+bool GenericProjectNode::deleteFiles(const ProjectExplorer::FileType fileType,
+                                     const QStringList &filePaths)
+{
+    Q_UNUSED(fileType)
+    Q_UNUSED(filePaths)
+    return false;
+}
+
 bool GenericProjectNode::renameFile(const ProjectExplorer::FileType fileType,
                                     const QString &filePath, const QString &newFilePath)
 {