Bring back text shadow to background tasks progress

frontend/src/App/notification.scss

@@ -1,3 +1,6 @@
+@import "../@scss/variable.scss";
+@import "../@scss/bazarr.scss";
+
 @function theme-color($key: "primary") {
   @return map-get($theme-colors, $key);
 }
@@ -32,6 +35,13 @@
       word-wrap: break-word;
       white-space: normal;
     }
+
+    .progress .progress-bar {
+      text-shadow: -2px -2px 5px theme-color("primary"),
+        2px -2px 5px theme-color("primary"), -2px 2px 5px theme-color("primary"),
+        2px 2px 5px theme-color("primary");
+      overflow: visible;
+    }
   }
 
   .notification-center-notification {