UX: append ellipsis to actions that have follow-up screen (PR #13943)

This commit adds ellipsis (...) to all the action text that has follow-up screen. Here are the action texts I updated:

Topic admin wrench

  • Make Public Topic…
  • Set Slow Mode…

Post admin wrench

  • Add Staff Notice…
  • Change Staff Notice…
  • Change Ownership…
  • Grant Badge…

Bulk Action

  • Set Category…
  • Notifications…

GitHub

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