Add functionality to reset an edited shader to original. Closes #2334

* We also add the ability to toggle on/off the replacement being active without
  needing to intentionally add a compile error (and this also makes it more
  explicitly clear when the shader replacement is enabled or not. This could be
  useful for quick A/B testing between the edited version and the original.

qrenderdoc/Windows/PythonShell.cpp

@@ -747,11 +747,11 @@ struct CaptureContextInvoker : ObjectForwarder<ICaptureContext>
                                     const rdcstrpairs &files, ShaderEncoding shaderEncoding,
                                     ShaderCompileFlags flags,
                                     IShaderViewer::SaveCallback saveCallback,
-                                    IShaderViewer::CloseCallback closeCallback) override
+                                    IShaderViewer::RevertCallback revertCallback) override
   {
     return InvokeRetFunction<IShaderViewer *>(&ICaptureContext::EditShader, id, stage, entryPoint,
                                               files, shaderEncoding, flags, saveCallback,
-                                              closeCallback);
+                                              revertCallback);
   }
 
   virtual IShaderViewer *DebugShader(const ShaderBindpointMapping *bind,