Feature/add unit test to blazor

[kbeaugrand]

Description

What's new?

• Add front unit tests

What kind of change does this PR introduce?

• Bugfix
• Feature
• Code style update (formatting, local variables)
• Refactoring (no functional changes, no api changes)
• Build related changes
• CI related changes
• Documentation content changes
• Tests
• Other

[codecov]

Codecov Report

Merging #329 (7d7ce52) into main (0a701fc) will increase coverage by 0.89%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main     #329      +/-   ##
==========================================
+ Coverage   40.30%   41.19%   +0.89%     
==========================================
  Files          95       95              
  Lines        2784     2784              
==========================================
+ Hits         1122     1147      +25     
+ Misses       1662     1637      -25     

Impacted Files	Coverage Δ
...b.Portal/Client/Pages/Devices/DeviceListPage.razor	35.71% <ø> (+35.71%)	⬆️

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