Calendar Panel: improve look when bar is transparent + NBox simplification.

Modules/Bar/Widgets/LockKeys.qml

@@ -6,8 +6,8 @@ import qs.Commons
 import qs.Modules.Settings
 import qs.Services
 import qs.Widgets
-//import qs.Modules.Bar.Extras
 
+//import qs.Modules.Bar.Extras
 Rectangle {
   id: root
 

Modules/Settings/Tabs/WallpaperTab.qml

@@ -65,7 +65,7 @@ ColumnLayout {
 
       Layout.fillWidth: true
       radius: Style.radiusM
-      color: Color.mSurfaceVariant
+      color: Color.mSurface
       border.color: Color.mOutline
       border.width: Style.borderS
       implicitHeight: contentCol.implicitHeight + Style.marginL * 2