Merge 254237@main - [GTK4] UI process hang when opening HTML select e…

…lements (combo boxes)

https://bugs.webkit.org/show_bug.cgi?id=238323

Reviewed by Michael Catanzaro.

Hide the popover before destroying it.

* Source/WebKit/UIProcess/gtk/WebPopupMenuProxyGtk.cpp:
(WebKit::WebPopupMenuProxyGtk::hidePopupMenu):

Canonical link: https://commits.webkit.org/254237@main

(cherry picked from commit 4e07bc3)

Source/WebKit/UIProcess/gtk/WebPopupMenuProxyGtk.cpp

@@ -412,6 +412,7 @@ void WebPopupMenuProxyGtk::hidePopupMenu()
     }
 
 #if USE(GTK4)
+    gtk_popover_popdown(GTK_POPOVER(m_popup));
     g_clear_pointer(&m_popup, gtk_widget_unparent);
 #else
     gtk_widget_destroy(m_popup);