[random test failure] Try to un-skip and fix LayoutBuilderTest::testLayoutBuilderUi in context of [#3353085]

Both should_fail and non_fail patch run 5 times. That's 7500 individual tests per patch.

Both should_fail and non_fail patch ran 5 times. That's 7500 individual tests per patch.

Conditions of the issue summary appear to have been met. Know we are staggering these in 12 hours apart so adding to the list to be added.

Committed da34050 and pushed to 10.1.x. Thanks!

Leaving 'to be ported' for 10.0.x and lower.

Cherry-picked to 10.0.x and 9.5.x, thanks!

Automatically closed - issue fixed for 2 weeks with no activity.