Merge main-page and main-page-container components

[rfontanarosa]

closes #1021

[codecov-commenter]

Codecov Report

❌ Patch coverage is 83.33333% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 62.49%. Comparing base (ce86519) to head (b9385c0).
⚠️ Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
...rc/app/components/main-page/main-page.component.ts	83.33%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2531      +/-   ##
==========================================
- Coverage   62.58%   62.49%   -0.09%     
==========================================
  Files         120      119       -1     
  Lines        2865     2861       -4     
  Branches      425      426       +1     
==========================================
- Hits         1793     1788       -5     
  Misses       1012     1012              
- Partials       60       61       +1     

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