fix: add scrollbar to installed plugin list

[brenopolanski]

Summary

If 5+ plugins are installed then add a scrollbar to the plugin list.

before:

after:

Checklist

• Documentation (if necessary)
• Tests (if necessary)
• Ready to be merged

[codecov]

Codecov Report

Merging #1820 into develop will decrease coverage by 0.00%.
The diff coverage is 0.00%.

@@             Coverage Diff             @@
##           develop    #1820      +/-   ##
===========================================
- Coverage    60.15%   60.14%   -0.01%     
===========================================
  Files          369      369              
  Lines         9142     9141       -1     
  Branches      1869     1869              
===========================================
- Hits          5499     5498       -1     
  Misses        3458     3458              
  Partials       185      185              

Impacted Files	Coverage Δ
.../components/App/AppSidemenu/AppSidemenuPlugins.vue	16.66% <0.00%> (-11.91%)	⬇️

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