Made lots of windows stay on top of the main window.
Fixed a bug with the close menu item and the terminal window being open.
Fixed the thumbnail rendering for a gcode sd file
Fixe a bug with sd card printing progress not showing
Made the sd gcode progress bar reset on new print.
Don't close the terminal unless we are actually closing.
Make the terminal do the right filtering when opening.
Make the open save state more robust.
Make MC able to be the minimum size on load.
Switch to gcode in the embedded view if loaded.
Moving some slice settings ui code into a class so it is easier to move later
Took out some dead code (confusing me about were my changes needed to go)
Renamed some classes for clarity Widget to Window
Changed the edit icon to be something more familiar
Merge pull request #131 from larsbrubaker/development

Moving some slice settings ui code into a class so it is easier to move ...