Use ImmutableJS correctly for frameOpts

[bbondy]

This is already covered by misc-components automated tests, several were
failing that I didn't know were related.

Fix #10376

Auditors: @bsclifton

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

[bsclifton]

++

[codecov-io]

Codecov Report

Merging #10382 into master will not change coverage.
The diff coverage is 0%.

@@           Coverage Diff           @@
##           master   #10382   +/-   ##
=======================================
  Coverage   53.74%   53.74%           
=======================================
  Files         238      238           
  Lines       21046    21046           
  Branches     3256     3256           
=======================================
  Hits        11312    11312           
  Misses       9734     9734

Flag	Coverage Δ
#unittest	53.74% <0%> (ø)	⬆️

Impacted Files	Coverage Δ
js/stores/appStore.js	11.63% <0%> (ø)	⬆️