[gnome-control-center] network: Fix QR code with dark theme

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

commit 15df3bc49477098575d914cce62b8dc91ee8e6a4
Author: Mohammed Sadiq <sadiq sadiqpk org>
Date:   Fri Feb 11 11:35:00 2022 +0530

    network: Fix QR code with dark theme
    
    Explicitly set white background for the image so that white border
    is shown around the QR code in dark themes too.

 panels/network/wifi-panel.css | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/panels/network/wifi-panel.css b/panels/network/wifi-panel.css
index cacb24fae..de7d80c96 100644
--- a/panels/network/wifi-panel.css
+++ b/panels/network/wifi-panel.css
@@ -1,4 +1,5 @@
 .qr-image {
+  background: #fff;
   padding: 12px;
 }