[gnome-games] collections-page: Add invalidate_filter()

[Alexander Mikhaylenko <alexm src gnome org>]

commit 41377d4c1fe351315751a51064a7d58e7ac4be9c
Author: Neville <nevilleantony98 gmail com>
Date:   Thu Jul 30 20:53:36 2020 +0530

    collections-page: Add invalidate_filter()
    
    Invalidates CollectionsMainPage's flowbox filter.

 src/ui/collections-page.vala | 4 ++++
 1 file changed, 4 insertions(+)
---
diff --git a/src/ui/collections-page.vala b/src/ui/collections-page.vala
index 4c5b84490..2105aae37 100644
--- a/src/ui/collections-page.vala
+++ b/src/ui/collections-page.vala
@@ -114,6 +114,10 @@ private class Games.CollectionsPage : Gtk.Bin {
                return current_collection;
        }
 
+       public void invalidate_filter () {
+               collections_main_page.invalidate_filter ();
+       }
+
        [GtkCallback]
        private bool on_subpage_back_clicked () {
                if (!is_subpage_open)