Missing caption styling added (#1001)

Co-authored-by: sarpere <[email protected]>

Author: sarpere

assets/index.less

@@ -284,6 +284,13 @@
     border-bottom: 0;
   }
 
+  // ================= Caption ==================
+  &-caption {
+    padding: @cell-padding;
+    border-right: @border;
+    border-bottom: @border;
+  }
+
   // ================= Footer =================
   &-footer {
     padding: @cell-padding;