PLT-2395 - Improvements to backstage css

webapp/sass/responsive/_tablet.scss

@@ -15,6 +15,19 @@
         }
     }
 
+    .backstage-content {
+        margin: 30px;
+        max-width: 100%;
+        padding: 0;
+    }
+
+    .backstage-sidebar {
+        height: auto;
+        padding: 30px 15px 0;
+        position: relative;
+        width: 100%;
+    }
+
     .help__format-text {
         display: none;
     }