This includes
- GtkCellArea
- GtkCellAreaBox
- GtkCellAreaContext
- GtkCellEditable
- GtkCellRenderer
- GtkCellRendererAccel
- GtkCellRendererCombo
- GtkCellRendererPixbuf
- GtkCellRendererProgress
- GtkCellRendererSpin
- GtkCellRendererSpinner
- GtkCellRendererText
- GtkCellRendererToggle
- GtkCellView
- GtkComboBox
- GtkComboBoxText
- GtkIconView
- GtkListStore
- GtkTreeModel
- GtkTreeModelFilter
- GtkTreeModelSort
- GtkTreeStore
- GtkTreeView
- GtkTreeViewColumn
- GtkTreeSelection
This MR does not port the file chooser and file chooser entry, but all the rest of gtk/ is covered.