Add submission count to the LOI list

[rfontanarosa]

closes #1314

[codecov-commenter]

Codecov Report

❌ Patch coverage is 66.66667% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 60.76%. Comparing base (e7be35c) to head (1b8b674).
⚠️ Report is 2 commits behind head on master.

Files with missing lines	Patch %	Lines
web/src/app/converters/loi-data-converter.ts	0.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2509      +/-   ##
==========================================
- Coverage   60.77%   60.76%   -0.01%     
==========================================
  Files         116      116              
  Lines        2845     2847       +2     
  Branches      428      430       +2     
==========================================
+ Hits         1729     1730       +1     
  Misses       1055     1055              
- Partials       61       62       +1     

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