Ticket #55183: 55183.2.diff

src/wp-content/themes/twentythirteen/css/editor-blocks.css

@@ -319 +319 @@
         width: 100%;
 }
 
+.block-editor-block-list__block.wp-block-table th,
 .wp-block-table th {
         border: 0;
         font-weight: bold;
         text-transform: uppercase;
+        padding: 0.5em;
 }
 
+.block-editor-block-list__block.wp-block-table td,
 .editor-block-list__block .wp-block-table td {
         border: 0;
         border-top: 1px solid #ededed;
-        padding: 0;
+        padding: 0.5em;
 }
 
+.wp-block-table th:focus,
+.wp-block-table td:focus {
+        box-shadow: inset 0 0 0 1px var(--wp-admin-theme-color);
+}
+
 /*--------------------------------------------------------------
 6.0 Blocks - Layout Elements
 --------------------------------------------------------------*/