[frontend] harmonise the size of dashboard icons (#6296)

[frapuks]

Proposed changes

• harmonise the size of dashboard icons

Related issues

• Icon size in dashboard choice (on home) #6296

Checklist

• I consider the submitted work as finished
• I tested the code for its functionality
• I wrote test cases for the relevant uses case
• I added/update the relevant documentation (either on github or on notion)
• Where necessary I refactored code to improve the overall quality

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 66.67%. Comparing base (d793a45) to head (0d50811).

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #6300   +/-   ##
=======================================
  Coverage   66.67%   66.67%           
=======================================
  Files         541      541           
  Lines       64420    64420           
  Branches     5256     5257    +1     
=======================================
+ Hits        42950    42955    +5     
+ Misses      21470    21465    -5     

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