SF-3669 Fix chapter select is blank on draft formatting page

[RaymondLuong3]

Previously we relied on the target text info to determine the number of chapters with drafts. However, this is not accurate since the number of chapters is dependent on the translation source. This change updates the formatting options component to use the number of chapters in the translation source in calculating the number of drafted chapters.

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This change is 

[codecov]

Codecov Report

❌ Patch coverage is 90.00000% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 83.29%. Comparing base (641c5f8) to head (2dd90cd).
✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
...n/draft-usfm-format/draft-usfm-format.component.ts	90.00%	0 Missing and 2 partials ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #3649   +/-   ##
=======================================
  Coverage   83.29%   83.29%           
=======================================
  Files         611      611           
  Lines       37646    37646           
  Branches     6182     6180    -2     
=======================================
+ Hits        31358    31359    +1     
+ Misses       5345     5331   -14     
- Partials      943      956   +13     

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[Nateowami]

@Nateowami made 1 comment.
Reviewable status: 0 of 2 files reviewed, all discussions resolved.

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src/SIL.XForge.Scripture/ClientApp/src/app/translate/draft-generation/draft-usfm-format/draft-usfm-format.component.ts line 269 at r1 (raw file):

      .pipe(quietTakeUntilDestroyed(this.destroyRef))
      .subscribe(async ([source, bookNum]) => {
        if (this.translateSource == null) {

@RaymondLuong3 The failure is saying you could write:

this.translateSource ??= (await this.projectService.getProfile(source.draftingSources[0].projectRef)).data;