GLMixer Code

Validating minor changes in dev of Basket Source.

BugFix Size Selection widget (missing values) and runtime check for
validity of values.

Complete implementation of Basket Source creation dialog.

First working implementation of Basket Source, with GUI and saving in
session file.

Minor improvement of transition when loading session.

BugFix: corrected update of freeframe plugin stack in set configuration
of source.

BugFix; back to READY mode (from ACTIVE) when a new event is stored (fix
the problem of wrong undo for same action after an undo).

BugFix commit 1472

re-connect texture to freeframe gl plugin when changing original of
clone source.

if we replace a video source, help user by showing the same directory.