Improve image blurring

[erri120]

Should fix #769.

[codecov]

Codecov Report

Merging #775 (b12bf5e) into main (f699d8e) will increase coverage by 0.14%.
Report is 2 commits behind head on main.
The diff coverage is 50.00%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #775      +/-   ##
==========================================
+ Coverage   62.80%   62.94%   +0.14%     
==========================================
  Files         610      609       -1     
  Lines       18456    18429      -27     
  Branches     1302     1301       -1     
==========================================
+ Hits        11591    11600       +9     
+ Misses       6520     6484      -36     
  Partials      345      345              

Flag	Coverage Δ
Linux	62.28% <50.00%> (+0.15%)	⬆️
Windows	62.02% <50.00%> (+0.01%)	⬆️
clean_environment_tests	62.92% <50.00%> (+0.13%)	⬆️
network_tests	?

Flags with carried forward coverage won't be shown. Click here to find out more.

Files	Coverage Δ
src/NexusMods.App.UI/WorkspaceSystem/IconUtils.cs	100.00% <100.00%> (ø)
...I/Controls/GameWidget/GameWidgetDesignViewModel.cs	0.00% <0.00%> (ø)
src/NexusMods.App.UI/ReactiveUIExtensions.cs	58.82% <0.00%> (-2.41%)	⬇️
....App.UI/Controls/GameWidget/GameWidgetViewModel.cs	81.08% <66.66%> (+41.08%)	⬆️
...usMods.App.UI/Extensions/SkiaAvaloniaExtensions.cs	42.30% <42.85%> (+42.30%)	⬆️

... and 11 files with indirect coverage changes

[Sewer56]

Looks good to me, no complaints :p