Fix and improve reports

[VMelnalksnis]

No description provided.

[codecov]

Codecov Report

Merging #602 (e962159) into master (c9f368e) will decrease coverage by 0.03%.
The diff coverage is 37.23%.

@@            Coverage Diff             @@
##           master     #602      +/-   ##
==========================================
- Coverage   68.14%   68.11%   -0.04%     
==========================================
  Files         303      303              
  Lines        9158     9193      +35     
  Branches      676      679       +3     
==========================================
+ Hits         6241     6262      +21     
- Misses       2671     2681      +10     
- Partials      246      250       +4     

Impacted Files	Coverage Δ
.../Gnomeshade.Avalonia.Core/AutoCompleteSelectors.cs	0.00% <0.00%> (ø)
...Gnomeshade.Data/Repositories/PurchaseRepository.cs	76.47% <0.00%> (-4.78%)	⬇️
...de.Avalonia.Core/Reports/ProductReportViewModel.cs	25.16% <32.81%> (+9.59%)	⬆️
source/Gnomeshade.Avalonia.Core/Converters.cs	75.00% <50.00%> (-25.00%)	⬇️
...e.Avalonia.Core/Reports/CategoryReportViewModel.cs	67.04% <52.00%> (-0.78%)	⬇️
...onia.Core/DesignTime/DesignTimeGnomeshadeClient.cs	72.38% <0.00%> (+0.31%)	⬆️

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