* Changes in 2.2.40 (Oct 11, 2023)

+ The PhotoDiode adapter can toggle the photodiode trigger when an eventcode
is issued, which can be used to check the duration of image presentation.
https://monkeylogic.nimh.nih.gov/docs_RuntimeFunctions.html#PhotoDiode

- The adapters that manipulate the properties of graphic objects, such as
CurveTracer, ImageChanger, GraphicProperty and BackgroundColorChanger, use
a list of parameters. The list was incorrectly reused if a frame was skipped
at the very last frame of the scene. It is fixed now.

+ The GraphicProperty adapter now returns the time when new properties were
applied.
https://monkeylogic.nimh.nih.gov/docs_RuntimeFunctions.html#GraphicProperty