[gtk+] menubutton: Remove prelight state when button is deactivated

[Timm Bäder <baedert src gnome org>]

commit cfd15c95b0e75d3f75ca62cc12e6ff680d39eb57
Author: Michael Catanzaro <mcatanzaro igalia com>
Date:   Sun Apr 30 13:26:13 2017 -0500

    menubutton: Remove prelight state when button is deactivated
    
    If the button is deactivated, it should not appear to be hovered
    anymore.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=781992

 gtk/gtkmenubutton.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/gtk/gtkmenubutton.c b/gtk/gtkmenubutton.c
index 43e18a3..9a3d572 100644
--- a/gtk/gtkmenubutton.c
+++ b/gtk/gtkmenubutton.c
@@ -652,6 +652,7 @@ static gboolean
 menu_deactivate_cb (GtkMenuButton *menu_button)
 {
   gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (menu_button), FALSE);
+  gtk_widget_unset_state_flags (GTK_WIDGET (menu_button), GTK_STATE_FLAG_PRELIGHT);
 
   return TRUE;
 }