Add tests for LT-22576

[imnasnainaec]

Quick Summary

Tests requested by #1051 author, generated by Claude.

Devin review: https://app.devin.ai/review/sillsdev/FieldWorks/pull/1052

CI-ready checklist

• Commit messages follow .github/commit-guidelines.md (subject ≤ 72 chars, no trailing punctuation; if body present, blank line then ≤ 80-char lines).
• No whitespace warnings locally:

  git fetch origin
  git log --check --pretty=format:"---% h% s" origin/<base>..
  git diff --check --cached

• Builds/tests pass locally (or I've run the CI-style build via Bash script or MSBuild).
• If this is core-developer AI-assisted work, I followed Docs/workflows/ai-pr-workflow.md and ran pr-preflight or the equivalent branch-readiness review before requesting review.
• For any Src/** folders touched, corresponding AGENTS.md files are updated or explicitly confirmed still accurate.

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This change is 

[github-actions]

NUnit Tests

    1 files  ± 0      1 suites  ±0   7m 50s ⏱️ - 3m 43s
5 796 tests +35  5 715 ✅ +35  81 💤 ±0  0 ❌ ±0 
5 805 runs  +35  5 724 ✅ +35  81 💤 ±0  0 ❌ ±0 

Results for commit dec7d52. ± Comparison against base commit 3c9a28a.

This pull request removes 10 and adds 45 tests. Note that renamed tests count towards both.

LexEdDllTests.EntrySequenceChooserCommandKeepOwnerActiveWhenHidingTests ‑ AddComplexFormChooserCommand_OptsIn
LexEdDllTests.EntrySequenceChooserCommandKeepOwnerActiveWhenHidingTests ‑ AddPrimaryLexemeChooserCommand_OptsIn
SIL.FieldWorks.Common.Framework.DetailControls.ChooserCommandKeepOwnerActiveWhenHidingTests ‑ MakeInflAffixEntryChooserCommand_OptsIn
SIL.FieldWorks.Common.Framework.DetailControls.ChooserCommandKeepOwnerActiveWhenHidingTests ‑ MakeInflAffixSlotChooserCommand_DoesNotOptIn
SIL.FieldWorks.Common.RootSites.SimpleRootSiteTests.RefreshDisplayNeedsReconstructTests ‑ NotifyDataAccessSemanticsChanged_DefersUntilVisible
SIL.FieldWorks.Common.RootSites.SimpleRootSiteTests.RefreshDisplayNeedsReconstructTests ‑ NotifyDataAccessSemanticsChanged_Reconstructs_WhenRootBoxDoesNotNeedReconstruct
SIL.FieldWorks.Common.RootSites.SimpleRootSiteTests.RefreshDisplayNeedsReconstructTests ‑ RefreshDisplay_Reconstructs_WhenRootBoxNeedsReconstruct
SIL.FieldWorks.Common.RootSites.SimpleRootSiteTests.RefreshDisplayNeedsReconstructTests ‑ RefreshDisplay_SkipsReconstruct_WhenRootBoxDoesNotNeedReconstruct
SIL.FieldWorks.Common.RootSites.SimpleRootSiteTests.RefreshDisplayNeedsReconstructTests ‑ SetRootBoxDataAccessAndRefresh_Reconstructs_WhenSwapChangesDisplaySemantics
SIL.FieldWorks.Common.RootSites.SimpleRootSiteTests.RefreshDisplayNeedsReconstructTests ‑ SetRootBoxDataAccess_DoesNotReconstruct_WhenSwapIsCheap

LexEdDllTests.EntrySequenceChooserCommandKeepOwnerActiveWhenHidingTests ‑ AddComplexFormChooserCommand_KeepsOwnerActive
LexEdDllTests.EntrySequenceChooserCommandKeepOwnerActiveWhenHidingTests ‑ AddPrimaryLexemeChooserCommand_KeepsOwnerActive
LexTextControlsTests.LiftExportTests ‑ LiftExportRanges_CustomListRangeIdWithAmpersandIsEscapedExactlyOnce
LexTextControlsTests.LiftExportTests ‑ LiftExportRanges_CustomListRangeIdWithQuoteIsEscapedForAnAttribute
SIL.FieldWorks.Common.Framework.DetailControls.ChooserCommandKeepOwnerActiveWhenHidingTests ‑ MakeInflAffixEntryChooserCommand_KeepsOwnerActive
SIL.FieldWorks.Common.Framework.DetailControls.ChooserCommandKeepOwnerActiveWhenHidingTests ‑ MakeInflAffixSlotChooserCommand_KeepsOwnerActive
SIL.FieldWorks.Common.FwUtils.UIModeGatesTests ‑ IsSwitchingEnabled_FailsClosedForUnsetAndNegativeValues("   ")
SIL.FieldWorks.Common.FwUtils.UIModeGatesTests ‑ IsSwitchingEnabled_FailsClosedForUnsetAndNegativeValues(" off ")
SIL.FieldWorks.Common.FwUtils.UIModeGatesTests ‑ IsSwitchingEnabled_FailsClosedForUnsetAndNegativeValues("")
SIL.FieldWorks.Common.FwUtils.UIModeGatesTests ‑ IsSwitchingEnabled_FailsClosedForUnsetAndNegativeValues("0")
…

♻️ This comment has been updated with latest results.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 38.12%. Comparing base (3c9a28a) to head (dec7d52).
⚠️ Report is 18 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1052      +/-   ##
==========================================
+ Coverage   38.02%   38.12%   +0.09%     
==========================================
  Files        1499     1499              
  Lines      349910   350154     +244     
  Branches    40226    40241      +15     
==========================================
+ Hits       133055   133484     +429     
+ Misses     187577   187402     -175     
+ Partials    29278    29268      -10     

Files with missing lines	Coverage Δ
Src/LexText/Morphology/RuleFormulaControl.cs	14.37% <ø> (+14.37%)	⬆️
Src/LexText/Morphology/RuleFormulaSlice.cs	26.78% <100.00%> (+26.78%)	⬆️

... and 159 files with indirect coverage changes

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