lots changes:

- renamed scene files
- fixed options back using scene.Prev
- fixed initial zooming (finally)
- fixed reset zoom (key r)
- fixed initial size, now works with state loading as well

widgets.go

@@ -64,12 +64,12 @@ func NewCheckbox(
 	)
 }
 
-func NewSeparator() widget.PreferredSizeLocateableWidget {
+func NewSeparator(padding int) widget.PreferredSizeLocateableWidget {
 	c := widget.NewContainer(
 		widget.ContainerOpts.Layout(widget.NewRowLayout(
 			widget.RowLayoutOpts.Direction(widget.DirectionVertical),
 			widget.RowLayoutOpts.Padding(widget.Insets{
-				Top:    3,
+				Top:    padding,
 				Bottom: 0,
 			}))),
 		widget.ContainerOpts.WidgetOpts(