Added ability to save smoothed averages.

Signed-off-by: Nicola Ferralis <feranick@hotmail.com>
Better naming convention for output files (in saving intensities)

A tag with info about background subtraction is added.

Signed-off-by: Nicola Ferralis <feranick@hotmail.com>
Removed unused items in Plot toolbar.

Signed-off-by: Nicola Ferralis <feranick@hotmail.com>