[Grid] Cell editor is not closed when clicking outside the cell

[destus90]

Describe the bug If you have a component with the OnPush strategy, you cannot close the cell editor. Clicking outside of this editor should close it, at least this works with the Default strategy, but not with OnPush.

To Reproduce Steps to reproduce the behavior:

1. Go to https://stackblitz.com/edit/angular-84dqgn?file=app/app.component.ts
2. Click on some cell in the grid.
3. Click outside that cell.
4. Observe that the editor is still open.

Expected behavior Cell editor should have been closed.

Workaround Change the component strategy to Default or add a handler for cellClose event.