[polari] mainWindow: Unparent userListPopover on destroy

[Marge Bot <marge-bot src gnome org>]

commit 35ca3dee5aef11022213b9f6521e5ffb0094a7a5
Author: Florian Müllner <fmuellner gnome org>
Date:   Fri Sep 3 23:21:05 2021 +0200

    mainWindow: Unparent userListPopover on destroy
    
    If we set a parent of a widget, GTK4 expects us to unparent it
    as well. Fair enough.
    
    Part-of: <https://gitlab.gnome.org/GNOME/polari/-/merge_requests/231>

 src/mainWindow.js | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/src/mainWindow.js b/src/mainWindow.js
index f7aa438f..3762e9e4 100644
--- a/src/mainWindow.js
+++ b/src/mainWindow.js
@@ -282,6 +282,7 @@ export default GObject.registerClass({
             this._settings.reset('last-selected-channel');
 
         this.active_room = null;
+        this._userListPopover.unparent();
 
         this._accountsMonitor.disconnect(this._accountsChangedId);
         this._accountsMonitor.disconnect(this._accountReachableId);