fix table multi-select after sort

[diracdeltas]

fix #10971

test plan:

1. browse some sites, then go to about:history
2. click on any of the columns to sort the table
3. shift+click to select multiple entries
4. contiguous table entries should be selected, not random entries

Submitter Checklist:

• 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).
• Tagged reviewers and labelled the pull request as needed.

Test Plan:

Reviewer Checklist:

Tests

• Adequate test coverage exists to prevent regressions
• Tests should be independent and work correctly when run individually or as a suite ref
• New files have MPL2 license header

[codecov-io]

Codecov Report

Merging #11056 into master will increase coverage by 0.01%.
The diff coverage is 23.52%.

@@            Coverage Diff             @@
##           master   #11056      +/-   ##
==========================================
+ Coverage   54.61%   54.63%   +0.01%     
==========================================
  Files         249      249              
  Lines       21951    21949       -2     
  Branches     3435     3436       +1     
==========================================
+ Hits        11989    11992       +3     
+ Misses       9962     9957       -5

Flag	Coverage Δ
#unittest	54.63% <23.52%> (+0.01%)	⬆️

Impacted Files	Coverage Δ
app/renderer/components/common/sortableTable.js	61.75% <23.52%> (+1.31%)	⬆️

[ayumi]

🌻