[gnome-boxes] list-view: Use container remove signal to trigger cleanup

[Felipe Borges <felipeborges src gnome org>]

commit 3ee8564ab2a408c030c0d7dbd199793651448e4f
Author: Felipe Borges <felipeborges gnome org>
Date:   Thu Jan 4 13:57:54 2018 +0100

    list-view: Use container remove signal to trigger cleanup
    
    Instead of relying on our own remove_item handler we can connect
    to the "remove" signal of the list_view and trigger the cleanup
    code which removes the item from the size group.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=791839

 src/list-view.vala |   17 ++++++-----------
 1 files changed, 6 insertions(+), 11 deletions(-)
---
diff --git a/src/list-view.vala b/src/list-view.vala
index 8c9812a..f188391 100644
--- a/src/list-view.vala
+++ b/src/list-view.vala
@@ -88,20 +88,13 @@ private class Boxes.ListView: Gtk.ScrolledWindow, Boxes.ICollectionView, Boxes.U
     }
 
     public void remove_item (CollectionItem item) {
-        items_connections.remove (item);
-        remove_row (item);
     }
 
-    private void remove_row (CollectionItem item) {
-        foreach_row ((box_row) => {
-            var view_row = box_row.get_child () as ListViewRow;
-            if (view_row == null)
-                return;
+    private void remove_row (Gtk.Widget row) {
+        var item = row as CollectionItem;
+        items_connections.remove (item);
 
-            if (view_row.item == item) {
-                size_group.remove_widget (box_row);
-            }
-        });
+        size_group.remove_widget (row);
     }
 
     public void select_by_criteria (SelectionCriteria criteria) {
@@ -184,6 +177,8 @@ private class Boxes.ListView: Gtk.ScrolledWindow, Boxes.ICollectionView, Boxes.U
             window.select_item (item);
         });
 
+        (list_box as Gtk.Container).remove.connect (remove_row);
+
         update_selection_mode ();
     }