Fix up CSS related problems after antd update

[philippotto]

There are a couple of CSS regressions that need to be fixed.

• https://scm.slack.com/archives/C5AKLAV0B/p1741015478851899 Fix CSS spacing for actions in Dashboard > Tasks #8452
• https://scm.slack.com/archives/C5AKLAV0B/p1740727345290209?thread_ts=1740727307.827319&cid=C5AKLAV0B Fixed CSS alignment for skeleton tab buttons  #8451
• https://scm.slack.com/archives/C5AKLAV0B/p1739275386286009 Fix color theme for modals #8445
• https://scm.slack.com/archives/C5AKLAV0B/p1741773952288219 Fix color theme for modals #8445