For R.C. - Fleet UI: Comb through registration buttons (#40444)

[RachelElysia]

Issue

Followup on #35025

Description

• Previously merged in main with Fleet UI: Comb through registration buttons #40444
• This is for the 4.82 R.C.

 1300  git branch
 1301  git checkout fleetdm/rc-minor-fleet-v4.82.0
 1302  git checkout -b 35025-button-width-rc
 1303  git status
 1304  git diff
 1305  git log main
 1306  git cherry-pick 0ac2ce8dfdacf66d7cbd2d258611fdc655891e03
 1307  git push -u fleetdm 35025-button-width-rc

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
⚠️ Please upload report for BASE (rc-minor-fleet-v4.82.0@b67ac38). Learn more about missing BASE report.

Additional details and impacted files

@@                    Coverage Diff                    @@
##             rc-minor-fleet-v4.82.0   #40640   +/-   ##
=========================================================
  Coverage                          ?   66.34%           
=========================================================
  Files                             ?     2453           
  Lines                             ?   196248           
  Branches                          ?     8624           
=========================================================
  Hits                              ?   130205           
  Misses                            ?    54247           
  Partials                          ?    11796           

Flag	Coverage Δ
frontend	54.15% <ø> (?)

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