A few bug fixes

[AArnott]

No description provided.

[codecov-commenter]

Codecov Report

Merging #32 (8f06c72) into main (313047d) will decrease coverage by 0.12%.
The diff coverage is 35.48%.

@@            Coverage Diff             @@
##             main      #32      +/-   ##
==========================================
- Coverage   38.66%   38.54%   -0.12%     
==========================================
  Files          49       49              
  Lines        2196     2221      +25     
==========================================
+ Hits          849      856       +7     
- Misses       1347     1365      +18     

Impacted Files	Coverage Δ
src/MoneyMan.WPF/MainWindow.xaml	100.00% <ø> (ø)
...nagement.Tests/ViewModels/AccountViewModelTests.cs	0.00% <0.00%> (ø)
...ank.MoneyManagement/ViewModels/AccountViewModel.cs	91.26% <90.00%> (+0.43%)	⬆️
src/Nerdbank.MoneyManagement/MoneyFile.cs	94.91% <100.00%> (ø)
src/Nerdbank.MoneyManagement/Utilities.cs	100.00% <0.00%> (+3.22%)	⬆️

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