GLMixer Code

Do not show confirmation dialog for saving screenshot if user preference
specifies automatic saving in a folder.

Bug fix and performance check on Render Loopback source.

Automatic saving in a folder of capture images.

Asynchronous saving of the recording, extended recording buffer up to 4
GB, and bugs fixed in encoding.

Implementation of user configuration of the recording buffer size.

Hide output window when recording.

Extending recording buffer size.

Implementation of array of boolean as input for ShaderToy plugin code
(not accessible yet in the GUI).

Added option to disable output window when recording: it seems to
improve performance on some hardware.

Enable selection / deselection of sources from the catalog view.