Expose UI extension management via context menu in project explorer

* Allow reloading and viewing output from context. Also add items for viewing in
  file explorer.

qrenderdoc/Windows/PythonShell.h

@@ -152,6 +152,7 @@ private slots:
   void textOutput(const QString &extension, bool isStdError, const QString &output);
   void extensionLoaded(const QString &extension);
   void editor_contextMenu(const QPoint &pos);
+  void projectExplorer_contextMenu(const QPoint &pos);
   void editorTab_Changed(int index);
   void doSyntaxCheck();
 
@@ -179,6 +180,8 @@ private:
 
   QFileSystemWatcher *m_Watcher = NULL;
 
+  QList<QString> m_ModifiedExtensions;
+
   QTimer *m_SyntaxCheckTimer;
 
   QCompleter *m_InteractiveCompleter;