Change 412651 had a related patch set uploaded (by Santhosh; owner: Santhosh):
[mediawiki/extensions/ContentTranslation@master] Refactor the translation view column layout to match new design

https://gerrit.wikimedia.org/r/412651

Change 412651 merged by jenkins-bot:
[mediawiki/extensions/ContentTranslation@master] Refactor the translation view column layout to match new design

https://gerrit.wikimedia.org/r/412651

Mockup of intended state shows personal header having more indentation than margins around the main content. I have made header edges and main content edges aligned. This is approximate look after the patch:

In T186876#3995563, @Petar.petkovic wrote:

@Pginer-WMF, any thoughts?

Ignore that aspect of the mockup (it was reusing the header component from somewhere else and was not further adjusted), your screenshot looks good in that regard.

In T186876#4007565, @Etonkovidova wrote:

@Petar.petkovic - the task has CX2 tag and cx-testing does not have the fix. Any reason for not having the new stuff there? Is it going to be deployed (there is no deployment tag)?

All the changes in the near future (this and next quarter) are focused on CX2. New changes would ideally not affect (and don't bring regressions to) CX1, since we stopped developing CX1 in favor of moving faster with CX2 development.
Given that, I suggest that onward you check specs from the ticket in CX2 and regularly check CX1 for regressions.

That can be daunting task, so we will be cautious not to bring regressions to CX1.

Once CX2 is fully functional and in usable state, it will coexist with CX1 in production. At some point, we will prohibit any new translation to be created with CX1 and give one year for translations in progress to be completed. After that, CX1 will be sunset. King will be dead. All will hail the new king - CX2 :)