Display 'n/a' for jobs when no LinkedIn page available

[brianlove]

If a company has no LinkedIn page, display 'n/a' for the jobs counts instead of zero to not give an incorrect impression of the jobs counts.

Closes #234

Questions

@za158 How should the 'Workforce' section of the detail page be handled for these cases?

[github-actions[bot]]

No need for rebasing :+1: behind_count is 0 ahead_count is 2

[github-actions[bot]]

☂️ Python Coverage

current status: ✅

Overall Coverage

Lines	Covered	Coverage	Threshold	Status
572	370	65%	0%	🟢

New Files

No new covered files...

Modified Files

No covered modified files...

updated for commit: 2bed65f by action🐍

[github-actions[bot]]

JavaScript Coverage

Summary

Lines	Statements	Branches	Functions
	67.91% (398/586)	57.78% (193/334)	68.04% (132/194)

Modified Files • (67%)

File	% Stmts	% Branch	% Funcs	% Lines	Uncovered Line #s
All files	67.91	57.78	68.04	67.57
components	64.22	59.07	62.59	63.76
DetailViewWorkforce.jsx	0	0	0	0	11–25
static_data	70.58	48.48	75	67.74
table_columns.js	69.69	48.48	75	66.66	196–229, 246–248, 276, 322–348, 365–596

[za158]

@brianlove Is it ~easy to hide the content in its entirety (big numbers plus explanatory text) and just put in some explanatory text TK?

(I'm implicitly assuming that if we lack data for one, we lack data for both - is that always the case?)

[brianlove]

Yes, displaying some other text instead of these stat boxes is quite easy.

Your assumption checks out - my investigations revealed that if the linkedin array is empty (the check that I'm using for displaying "n/a" here), both ai_jobs and tt1_jobs are always zero. There are also cases where a non-empty linkedin array has zeros for one or more job stats, but those are still displayed.

[brianlove]

Text contents and alert styles TBD: