The lists of changed fields on a "review request changed" box was

ancient, with spacing and font size inconsistencies, mobile issues, no

accessibility affordances, and some regressions with recent styling

changes.
This has been redone, as a sort of first pass that we can build upon in

the future. We now have two new components we can use:


rb-c-review-request-changed-fields: The container for the entire

  list of changed fields in the entry box, managing overall layout and

  the styling for inner value types.


rb-c-review-request-changed-value: An old/new diff display for a

  single simple field value, such as Branch, Summary, or Depends On.


The rb-c-review-request-changed-fields component is a definition list

consisting of field names and their value changes. It uses CSS grid to

do the layout, in a responsive manner. Subgrids are employed when

supported by the browser in order to help all fields line up correctly

(without it, we use a minimum width to achieve a similar effect).
There's now one of these lists instead of many, which can help with

navigating using assistive technologies. We also make use of ARIA labels

throughout this.
rb-c-review-request-changed-value works as the old field changes did

before, but is slightly polished in that it's now less boxy, employing a

soft rounded border.
The changed fields component optimistically aligns the labels and values

with a baseline. This works great for the changed value component and

other simple text-based value representations. However, in an effort to

properly align things, special rules for certain value components are

added. This gives us alignment for diffed text displays, file attachment

thumbnails, and the commits list.
Field changes were made to aid in this and to help with consistency:

File attachments now have a parent container that we can set to be a

  flexbox.
Status now says "Completed" instead of "Closed (submitted)".

Some fields (namely file attachment captions) still need a lot of love,

but that's for another release.
The overall presentation, while resembling what we had before, is now

much more polished, and will be easier to work with going forward.

Tested in Chrome and Firefox in light and dark modes.
Tested with and without subgrid support (by altering the name checked

by @support), and on mobile. Verified the presentation was correct

in each case.
Tested every field type in all the above cases.