[backend/frontend] Dashboard selection fix + some widget alignment (#8433)

[Kedae]

Closes #8433

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 66.58%. Comparing base (e4d0be2) to head (9e5581e).
Report is 38 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #8590      +/-   ##
==========================================
+ Coverage   66.21%   66.58%   +0.36%     
==========================================
  Files         597      597              
  Lines       60422    60577     +155     
  Branches     6204     6559     +355     
==========================================
+ Hits        40008    40333     +325     
+ Misses      20414    20244     -170     

Flag	Coverage Δ
	66.21% <100.00%> (+<0.01%)	⬆️

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