fix: Wallpaper overlay was too dark

In recent cozy-ui updates we did some changes on Layout components and the background-color: white was not applied to the correct component anymore.

Author: zatteo

src/containers/App.jsx

@@ -104,7 +104,8 @@ const App = () => {
   }
 
   return (
-    <Layout monoColumn>
+    // u-bg-white avoids mix-blend-mode from home-custom-background to be linked to the background color of the body. Must not be responsive to the theme.
+    <Layout monoColumn className="u-bg-white">
       <BarComponent
         searchOptions={{ enabled: false }}
         componentsProps={{

src/styles/app.styl

@@ -24,9 +24,6 @@ body
         overflow auto
 
 .App
-    // Avoid mix-blend-mode from home-custom-background to be linked to the background color of the body.
-    // Must not be responsive to the theme.
-    background-color white
     overflow-y overlay
 
     &.custom-wallpaper