Issue #2413311: Move API contennt tables above sidebar

sass/partials/common/_api.scss

@@ -22,14 +22,22 @@
     }
   }
 
-  // Lists in the main content area, such as class hierarchies.
-  #content ul {
-    padding-left: 0;
+  #content {
+    // Lists in the main content area, such as class hierarchies.
     ul {
-      padding-left: 1.5em;
+      padding-left: 0;
+      ul {
+        padding-left: 1.5em;
+      }
+      .item-list li {
+        list-style: disc;
+      }
     }
-    .item-list li {
-      list-style: disc;
+
+    // Tables in the main content area, such as the Form API reference.
+    table {
+      position: relative;
+      z-index: 1;
     }
   }
 }