Backed out 4 changesets (bug 1541666, bug 1541446, bug 1540904, bug 1540601) for dt failures at browser_accessibility_node_audit.js

Backed out changeset 7bcd00bbcb71 (bug 1541666)
Backed out changeset a27b2d203885 (bug 1540904)
Backed out changeset 9f43419c7b40 (bug 1541446)
Backed out changeset e3294a1be947 (bug 1540601)

devtools/client/shared/components/tree/TreeView.js

@@ -546,20 +546,7 @@ define(function(require, exports, module) {
           member: member,
           columns: this.state.columns,
           id: member.path,
-          ref: row => {
-            if (!row) {
-              return;
-            }
-
-            const rowEl = findDOMNode(row);
-            if (!rowEl || !rowEl.offsetParent) {
-              // offsetParent returns null when the element has style.display
-              // set to none (done by TreeView filtering).
-              return;
-            }
-
-            this.rows.push(row);
-          },
+          ref: row => row && this.rows.push(row),
           onClick: this.onClickRow.bind(this, member.path),
           onContextMenu: this.onContextMenu.bind(this, member),
         });