21.2.8

What's Changed

• fix(combo): address NG0100 in zoneless apps - 21.2.x by @ddaribo in #17315
• fix(hierarchical-grid): hide child row editing overlay on scroll - 21.2.x by @georgianastasov in #17303
• fix(grid): preserve refs and return new array to reflect changes by @IvanKitanov17 in #17320

Full Changelog: 21.2.7...21.2.8