Update empty state message and remove background color from empty section

Author: adamrefaey

frontend/src/common/utils/i18n/resources/en/reportDetail.json

@@ -67,7 +67,7 @@
     },
     "normal-values": {
       "title": "Normal values",
-      "empty": "No values available.",
+      "empty": "No values to display",
       "empty-description": "No normal values within the normal range were detected."
     },
     "conclusion": {

frontend/src/pages/Reports/ReportDetailPage.scss

@@ -193,7 +193,6 @@
 
   &__section-empty {
     padding: 24px 16px 32px;
-    background-color: #fff;
   }
 
   &__section-empty-content {