GDK_Select and GDK_Clear were duplicated, GDK_Calculater is
only useful for compulsive misspellers.

Fixed the button-sensivity patch done to GtkComboBox to account for
changes in appearance (changes to the appears-as-list style property).
Also, in list-mode, the event box that has been created below the cell
view also needs to have its sensitivity updated.

Add support for XF86keysym.h to gdkkeysyms-update.pl and
update the generated gdkkeysyms.h file for the latest sources.

Some of the settings come directly from cups config files, which
have no case sensitivity requirement, so we should not be more
picky.  Bug 594652.

This function is only used in deprecated, broken widgets. Also,
fix up some of its implmentation that clang was complaining about.

Pointed out by clang.

Pointed out by clang.

This was causing problems in gedit, which uses window groups.
Bug 593678.

Use the index instead, that can be -1.  A unit test has been added as
well.

Even for grabs we need to recurse up to look for what cursor to use.

Commit 3f306a40 made it possible for
gtk_tree_view_top_row_to_dy() to be called recursively.  (In a different
way than was already guarded for).  This caused a single test case in
the scrolling test suite to fail.  We now also guard for recursive calls at
the beginning of gtk_tree_view_top_row_to_dy().

Rework the sort and filter models to store their reference to the parent
element as an array index instead of a pointer to an array element.
These pointers could become invalid with any array modification, whereas
indices do not.

This fixes bug 588455 where the panel stopped responding to Alt-F2 when
setting a transparent background.

(There is one larger memleak left here, but this is a side effect of the
test case for bug 346800).

If we have a level with zero visible nodes and the first node becomes
visible in that level, then parent has just become a "real" parent node.
In such a case we need to emit row-has-child-toggled.  This only applies
to non-root levels that have a parent.  This problem was also found when
writing the unit test, the respective cases in the unit test have been
corrected.

This fixes bugs:
 Bug 372010 - Filtering not working properly
 Bug 525965 - Filtered and sorted GtkTreeView is missing rows

In gtk_tree_model_filter_remove_node(), we check if the given elt has
children.  If so, this level will be freed.  This action is recursive.

When a filter function is used that determines the visibility property
of a node using whether or it it has children, the state of this node
very likely changes when the filter model receives a
row-has-child-toggled signal.  Therefore, we need to handle state
changes in the row-has-child-toggled handler.