fix e2e tests

[scsaba]

No description provided.

[scsaba]

Hello @danfinlay @kumavis

I noticed that your e2e and screen tests were failing, so I spent a few days to figure out a workaround to bring them to life.

The solution is not the nicest, but maybe this is the least error prone way to get the development time extension id - without changing the manifest.json. This change has much lower risk as it cannot ruin the release package.

[danfinlay]

Oh very nice, this may fix the test failure in #4199. We'll review this today.

[scsaba]

Meanwhile I could come up with a simpler solution. I will update the pull request in a few hours.

[scsaba]

@danfinlay updated with the less complicated solution. It has a little risk, because /deep/ css combinator is deprecated. I can see no warning though. If it stops working later then it can be replaced with the other solution.

[danfinlay]

Thanks so much for this contribution.

It turns out some other team members were working on the same issue, and have fixed it similarly in PR #4226, so I'm closing this for now, since it appears to be redundant.

Thank you so much for jumping in and doing this, though!