fix: restore the blur on drawer (#3654)

lnbits/static/css/base.css

@@ -217,6 +217,7 @@ body.body--dark .q-header,
 body.body--dark .q-drawer {
   --q-dark: rgba(29, 29, 29, 0.3);
   background-color: var(--q-dark);
+  backdrop-filter: blur(6px) brightness(0.8);
 }
 
 :root {

lnbits/static/scss/background.scss

@@ -63,5 +63,6 @@ body.body--dark {
   .q-drawer {
     --q-dark: #{color.adjust(#1d1d1d, $alpha: -0.7)};
     background-color: var(--q-dark);
+    backdrop-filter: blur(6px) brightness(0.8);
   }
 }