Separate renderer draw functions for scroller buttons.
Spinner: have the child textedit inherit the spinner font.
Set a default groupbox margin.
Don't pass wzRenderer instance to button create functions. Instead, set the renderer when the button is added to the mainwindow hierarchy (get it from mainwindow), and use a virtual function to inform the button the renderer has changed.
Don't stomp on user set button padding.
Don't pass wzRenderer instance to label create function.
Removed unnecessary wzRenderer usage in wzcpp.
Don't pass wzRenderer instance to group box create function.