Fix global table indexing

[darkdh]

• Submitted a ticket for my issue if one did not already exist.
• Used Github auto-closing keywords in the commit message.
• Added/updated tests for this change (for new code or code which already has tests).
• Ran git rebase -i to squash commits (if needed).

fix #4741

Auditors: @bsclifton

Test Plan:

1. go to about:history
2. sort the table
3. multi select entries
4. right click on them
5. perform any actions in context menu
6. the action tagets should be correct

[bsclifton]

Looks great! Thanks for updating the code to use a custom attribute 😄

[luixxiul]

Have this fixed #4224 too?

[luixxiul]

follow-up: #4738