Wt

When using a layout that is resizable (setResizable()), a bar will appear between the two widget, that allow for the widgets to be resized. In case of setSpacing() being called as well, this bar will be resized depending on this value. E.g. a spacing of 0 will make the bar invisible, a spacing of 100 will make it much too wide.

This should have a constant width of a couple pixels (5px ?), and shouldnt' be allowed to resize depending on the spacing.
This should also take the spacing into account, in that if the size is forced, it should still have spacing with the surrounding widgets as per the defined value.