[gnome-shell] iconGrid: Delete private child property when removing child

[Florian Müllner <fmuellner src gnome org>]

commit 4915a9e8e404555379aa8807ad8c53c7589f2ae7
Author: Jonas Dreßler <verdre v0yd nl>
Date:   Sun Sep 8 18:09:23 2019 +0200

    iconGrid: Delete private child property when removing child
    
    Delete a private property we set when the child got added to make sure
    the reference is deleted after the child got removed from the grid.
    
    https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/704

 js/ui/iconGrid.js | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/js/ui/iconGrid.js b/js/ui/iconGrid.js
index e0a1e8bd8a..08d72aff1d 100644
--- a/js/ui/iconGrid.js
+++ b/js/ui/iconGrid.js
@@ -251,6 +251,7 @@ var IconGrid = GObject.registerClass({
 
     _childRemoved(grid, child) {
         child.disconnect(child._iconGridKeyFocusInId);
+        delete child._iconGridKeyFocusInId;
     }
 
     vfunc_get_preferred_width(_forHeight) {