Widgets initialize on the main thread #39

What steps will reproduce the problem?
1. Point slideshow at a large directory or remote directory
2. exit widgetfx
3. start widgetfx

What is the expected output? What do you see instead?

Would expect WidgetFX to start immediately and load widgets asychronously, 
instead it blocks until all widgets are completely loaded and 
initialized.  Rather than leaving it to individual widgets to do work on 
seperate threads, the dock should probably spin a separate process for 
each.