- Fix gimp_scroll_adjustment_values() for smooth scroll events
- Set GDK_SMOOTH_SCROLL_MASK on all widgets where we set GDK_SCROLL_MASK
- Add GIMP_ZOOM_SMOOTH to enum GimpZoomType
- Add "gdouble delta" to gimp_zoom_model_step()
- Change the meaning of the "scale" parameter to "scale or delta" in
all functions that take GimpZoomType and a scale factor.
Don't remove the GDK_KEY_space in GimpSearchPopup because that's
impossible and removes it from the entire GimpPopup class. Instead,
don't handle the "space -> confirm" binding manually if the focus
widget is a text widget.
Based on GimpPopup as parent, this is a generic search popup widget,
which can display any list of action. The results construction logics
is not part of the widget, and is built through a callback instead,
which could allow to use it to create different dialogs.
