(created another testbed @ https://style-testing.dreamwidth.org/ using 2.0; screen caps taken while logged into DW on Galaxy S6 Android 7.0/Firefox 65.0)

Underlying code that might want fiddling with on the following:

-- https://marahmarie.dreamwidth.org/file/452443.png and https://marahmarie.dreamwidth.org/file/453818.png
(on full-size comment forms OpenID username/pass field stretches out, forcing horizontal scroll)
-- https://marahmarie.dreamwidth.org/file/452935.png (entry tags next to green + sign don't completely align right)
-- https://marahmarie.dreamwidth.org/file/453129.png (every element of logged-in inline comment forms except Post and More Options buttons is centering; not sure if that's desired)
-- https://marahmarie.dreamwidth.org/file/458187.jpg (lj-cut image is top-aligned, if it's at all aligned; this might be desired, so just pointing it out)

The oinking you did so far on comment icon tables is looking great:
-- https://marahmarie.dreamwidth.org/file/453488.png

One thing on that; if you don't like the way Dreamwidth makes the icon images different sizes, which makes the table a bit ragged looking, you can smooth it out in the comment form and the resulting comment title on the entry page with something like this: #subjectIconList img{height:14px;width:14px} (comment form) .comment-subjecticon img{height:14px;width:14px} (comment title on entry page)

A search of #subjectIconList and .comment-subjecticon in my source (on this journal, not the testbed) will show the latest changes I've made to that.