Problem/Motivation
The Update form (/admin/reports/updates/update) has up to two tables; after #3113992: The 'Update' page has no idea that some updates are incompatible, it will have up to three tables. Here is a screenshot from that issue:

It is difficult to read the information on this page because the three table have different column widths.
Proposed resolution
Make the column widths consistent across the three tables.
For comparison, the Extend page (/admin/modules) has width: 4%; min-width: 25px; for the checkbox column, width: 25% for the module name, and the third column is unconstrained (but has class="description expand priority-low" so that it is hidden on narrow screens).
Remaining tasks
User interface changes
This issue will affect the display of the Update form (/admin/reports/updates/update).
API changes
None
Data model changes
None
Comments
Comment #2
dwwThanks for opening this! Agree this is needed, I pointed this out at #3113992-22: The 'Update' page has no idea that some updates are incompatible...
I suppose The Right Way(tm) to do this is to add the CSS directly to both Seven and Claro, but not mess with the update.module CSS, right? The module itself doesn't necessarily need to have an opinion about this, no?
Thanks again,
-Derek
Comment #3
benjifisherI am not sure about the Right Way(tm). The CSS rules for the Extend page that I mentioned in the issue summary come from
core/modules/system/css/system.admin.css.