Bug Fix - TODO commands in Experiment Editor

I have removed a bunch of TODO commands in the experiment editor.

Utilitites - Display Modes Enumerator
Utilities - Keyboard Scan Code Utility

Experiment - Package Experiment
Experiment - Validat All Files.

These should be re-added at some point as they are still useful features but not just hang in limbo taking up space while they are unfinished.

Bug Fix - About Dialog crash

Fixed a weird bug with the About Dialog in the Experiment Editor.  It was crashing because it could not find an Icon resource that was clearly there.  Don't care. Icon removed. Bug fixed.

Bug Fix - Editor - Load XML files not reporting errors correctly

Fixed a bug that effected all the PLL file types where the XML parser was not correctly reporting errors with the document back to the User.

This specifically effected bad DTD paths embedded in script, model, audiotrac, experiment and config files.