Fixes an issue with the color updates sometimes crashing. This was introduced because of a defect in VS 2012 not firing an update event when the color dialog colors changed. This has been reported to Microsoft. They have confirmed the bug and have a fix which will be in the final release. Once the final release of VS 2012 is out, I'll remove the code that caused the original issue although I'll probably keep the locks added in this version as a safety measure.