Save experiment in prefs as a string consistently across the application, redraw the green isense logo, ensure we have fields saved before finishing the StepOneSetup dialog, rotating no longer enables Step2 when it should be disabled, sample interval for a single session recording remembered when the user doesn't want it to be remembered for the next session.
Merge pull request #602 from stowellm/ms590

Save experiment in prefs as a string consistently across the application...