Fixes: https://bugzilla.gnome.org/show_bug.cgi?id=604289
In order to respect this properly, we have to restore the original
behavior by watching a flag to check if the user has already set this.
* gtk/gtkassistant.c: fix the bug by introducing a flag to check for
non-automatic value setting
* tests/testassistant.c: updated the "generous assistant" to permit
quick manual testing of this feature
Such paths (eg. a child node that is collapsed) should be ignored. This
is fixed by checking the return value of _gtk_tree_view_find_node(),
which returns a partial return value (the parent node) when it returns
TRUE. Also added a unit test.
Adapt gtk_tree_view_get_path_at_pos() and
gtk_tree_view_get_drag_dest_row() to just return FALSE when bin_window
is NULL and not hit a warning. Makes this case consistent with the tree
view not having a model. Documentation has been updated to clarify
this, unit test has been added.
Fixes bug 539377, based on a patch by Bjorn Lindqvist.
Includes a test case for bug 546005 to start with, logic provided by
Paul Pogonyshev and Bjorn Lindqvist. In the future, we should maybe
merge treeview-scrolling.c with this one to create one large monolithic
tree view tester.
