[gnome-shell/gnome-3-36] screenShield: Switch lightboxes off before unlock transition

[Georges Basile Stavracas Neto <gbsneto src gnome org>]

commit 8b80a4cf4da39a76ca9a304b11d68913cbd3f527
Author: Florian Müllner <fmuellner gnome org>
Date:   Wed Apr 1 12:48:10 2020 +0000

    screenShield: Switch lightboxes off before unlock transition
    
    There is no point in animating a transition with fullscreen black
    rectangles stacked on top, so switch them off before rather than
    after the transition.
    
    https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1158
    
    
    (cherry picked from commit fb6ead2881525676d49a331c726200a5d78cb65c)

 js/ui/screenShield.js | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)
---
diff --git a/js/ui/screenShield.js b/js/ui/screenShield.js
index de43d3da19..1107a5ce96 100644
--- a/js/ui/screenShield.js
+++ b/js/ui/screenShield.js
@@ -519,6 +519,9 @@ var ScreenShield = class {
             this._isModal = false;
         }
 
+        this._longLightbox.lightOff();
+        this._shortLightbox.lightOff();
+
         this._lockDialogGroup.ease({
             translation_y: -global.screen_height,
             duration: Overview.ANIMATION_TIME,
@@ -533,8 +536,6 @@ var ScreenShield = class {
             this._dialog = null;
         }
 
-        this._longLightbox.lightOff();
-        this._shortLightbox.lightOff();
         this.actor.hide();
 
         if (this._becameActiveId != 0) {