[admin] Misc. bugfixes

[elia]

Summary

Minor fixes noticed while working on #5385.

Checklist

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[codecov]

Codecov Report

Merging #5386 (a16647b) into nebulab/admin (74dcc5f) will increase coverage by 0.01%.
The diff coverage is 100.00%.

@@                Coverage Diff                @@
##           nebulab/admin    #5386      +/-   ##
=================================================
+ Coverage          88.86%   88.87%   +0.01%     
=================================================
  Files                615      615              
  Lines              14860    14861       +1     
=================================================
+ Hits               13205    13208       +3     
+ Misses              1655     1653       -2     

Files Changed	Coverage Δ
...components/solidus_admin/ui/toggletip/component.rb	100.00% <100.00%> (ø)
...p/controllers/solidus_admin/products_controller.rb	100.00% <100.00%> (+5.12%)	⬆️

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