Various cosmetic fixes to the GTK config box: vertical alignment of

edit box labels, Left/Right on the treeview to collapse and expand
branches, a window title, and the best treatment of wrapping text
widgets I could think of within the product-order-oriented GTK
layout model. I think this thing is now pretty much as good as it's
going to get before GTK v2 (which should fix one or two remaining
minor nasties which I really couldn't be bothered to work around in
GTK 1.2), so the next step is to actually start _using_ it.

[originally from svn r2979]

unix/gtkpanel.c

@@ -375,10 +375,6 @@ static void panels_size_allocate(GtkWidget *widget, GtkAllocation *alloc)
          children = children->next) {
         GtkAllocation call;
 
-        /* Only take visible widgets into account. */
-        if (!GTK_WIDGET_VISIBLE(child))
-            continue;
-
         call.x = alloc->x + border;
         call.width = alloc->width - 2*border;
         call.y = alloc->y + border;