GLMixer Code

BugFix: correct color for snapshot rendering.

OSX gui compatibility improvement

Changed terminology for consistency: screenshot is a capture of
rendering, snapshot is a capture of the configuration (snapshot
manager).

Slight improvement of the User Preference dialog for the source
properties: do not show all properties, but a clear (limited) set of
options.

Compatibility of snapshot actions with undo manager.

Compatibility of snapshot actions with undo manager. Stop animation in
snapshot view on clic on background.

Optimized JPEG compression size for saving Pixmap source.

BugFix: enable restore of TEMP snapshot.

BugFix: improper copy-paste :(...

BugFix: saving of names of sources in snapshot glm, not id (volatile).