Patches review

[Olivier Brunel <jjk jjacky com>]

Hi,

Lately I've been working on an app (GTK3) which has a treeview as its
main GUI component, and as such I've been coming up with some patches,
mostly treeview-related, from little bug fixes to some feature
additions, that I'd love to see merged.

I've already posted some of them on bugzilla, and I was wondering if
they could be reviewed?

treestore: Fix segfault when reordering non-existing children
https://bugzilla.gnome.org/show_bug.cgi?id=698396

gtkcellareabox: Fix renderer not always drawn when visible
https://bugzilla.gnome.org/show_bug.cgi?id=696965

GtkTreeView: Fix issues when removing a column
https://bugzilla.gnome.org/show_bug.cgi?id=710195

cellrenderertext: Fix possible overwriting of markup
https://bugzilla.gnome.org/show_bug.cgi?id=699060

Revert "treeview: Store editable position differently"
https://bugzilla.gnome.org/show_bug.cgi?id=710315

Fixes in gtk_tree_view_is_blank_at_pos() & Add
gtk_tree_view_is_blank_at_pos_full()
https://bugzilla.gnome.org/show_bug.cgi?id=696966

As well as this one, not from me but (I believe) is right:
gtk_tree_view_get_path_at_pos mistakenly identifies column of initial
pixels
https://bugzilla.gnome.org/show_bug.cgi?id=708148

Also this one, which isn't treeview-related:
Fix key "Page_Down" identified as "Next"
https://bugzilla.gnome.org/show_bug.cgi?id=710411

And as a side note, I see a new version of GLib was released, would have
been nice if this had been merged:
https://bugzilla.gnome.org/show_bug.cgi?id=710254

Thanks,
-jjacky