Fix deprecated gtk3 GtkMisc, GtkAlignment and vala Gdk.X11Display

gtk 3.13.4 warns GtkMisc and GtkAlignment
vala 0.24 warns Gdk.X11Display

https://git.gnome.org/browse/gtk+/commit/?id=ec0a60a248
https://git.gnome.org/browse/gtk+/commit/?id=04703689b8
https://git.gnome.org/browse/vala/commit/?id=b65e3dc87c

TEST=make ui/gtk3

Review URL: https://codereview.appspot.com/114820044