Don't enforce the cache size when the user is exiting the application (It is really slow when reading the directory on Windows).
Keep track of the folders that were imported.
The image cache manager needs to check for both a.jpg and a.embedded.jpg as the Windows version of ufrawbatch doesn't create the .embedded.jpg version.
Update the OpenGL control when we change from single photo mode to collage mode (Fixes a problem where the control didn't redraw straight away).
__WIN__ Tidy up.
__WIN__ Allow the application to exit when the user closes the main application window.
__WIN__ Enable and disable the Ok button when the from or to folder is changed.
__WIN__ Use a listener for the OpenGL view so that it doesn't rely on being parented by the mainwindow.