I'm replying to gain traction on this. I have 2 jenkins deployments with the exact same css theme and the exact same job.
On one deployment, everything looks normal (albeit very narrow):

On the second deployment, text and code are set to the right, escaping the narrow job config form:

As you can see in the screenshots above, the text/code fields are escaping the config editor form.
Upon closer inspection the `config-table scrollspy` table is breaking out of the config form when it's being rendered.
As you can see in the first screenshot below, there is a green rectangle on the right of the blue box – that is where the edge of the form is – in the second screenshot you can faintly see the gray on the left half of the page with a darker grey vertical line in the middle of the page representing that same edge of the form. The table breaks out on one jenkins, but an identical config/deployment/job looks normal (as illustrated in the first screenshot above):


Edit: I'm not going to include screenshots on this part – if you scale down to 90% in chrome, the issue sometimes goes away (but apparently not, when editing Pipeline job configs via UI).
gusreiber What about the CSS changes mentioned in comments to JENKINS-16327,
JENKINS-27367orJENKINS-35263? Do they not solve the problem?