Made 'Open', 'Save' and 'Bed' more intuitive

Added more sliders
Fixed issue with load progress indicator not clearing
Made value display update for more sliders

MatterControlLib/DesignTools/Operations/Image/ImageToPathObject3D_2.cs

@@ -414,6 +414,7 @@ namespace MatterHackers.MatterControl.DesignTools
 					UiThread.RunOnIdle(() =>
 					{
 						rebuildLock.Dispose();
+						Invalidate(InvalidateType.DisplayValues);
 						Parent?.Invalidate(new InvalidateArgs(this, InvalidateType.Path));
 					});