Using pyatspi.utils.findDescendant() on the GtkFileChooserDialog using
just a role would return the Dialog, as they have the same "file
chooser" role. So we have to give it a name to distinguish between
them.
The height of the text buttons depends on the font height,
whereas the search button has a fixed-size icon in it...
Prevent unevent heights by putting them all in a size group.
https://bugzilla.gnome.org/show_bug.cgi?id=745263
This subdirectory gets in the way when integrating the inspector
build more fully with GTK+, and does not really add anything.
Just move everything one level up.
