- Added gtk_cell_area_aligned_cell_area() to get the aligned
internal area use by a cell (for focus painting and for
event areas).
- Provide the event area in "editing-started" signal
- Fire "remove-editable" when editing is canceled by the user,
an implementing layouting widget need only catch "editing-started"
and "remove-editable" now.
- CellAreaScaffold/testcellarea now edit textrenderers.
Added concept of "Focus Siblings" to GtkCellArea so that some
static text/icon may be included in the focus/click area of
an activatable or editable cell, implemented focus drawing
as well, updated testcellarea to reflect the changes.
- Fixed focus driving in GtkCellArea with refined apis
- Added gtk_cell_area_activate() to be called when the area has focus
(to activate or start editing the focused cell)
- Added support for this in cellareascaffold
- testcellarea now watches the "toggled" signal for a toggle renderer
and updates the model state accordingly, this currently works with
keyboard navigation, however focus is still not painted on cells.
