GtkStack's Number of Pages Attribute isn't changeable in Glade
Hi everyone! GtkStack's number of pages attribute is can't be changed in a Glade file.
How to reproduce:
- Open the Glade, and create a new project.
- Create a Window, and add a Stack to it.
- Set number of pages the stack to 3.
- Add some widgets to the stack, e.g. GtkImage, GtkButton, and GtkLabel.
- Save and then reopen the project.
- Try to change the stack's number of pages attribute. Its won't change. But,
- Try to delete a widget in the stack. The attribute is changeable again.
I think the Glade loading pipelines should be fixed. And maybe it's can solve this #314 issue too.