fix: show 25 sessions by default

[snitin315]

Short description of what this resolves:

Refers #4800 (comment)

Changes proposed in this pull request:

Checklist

• I have read the Contribution & Best practices Guide.
• My branch is up-to-date with the Upstream development branch.
• The acceptance, integration, unit tests and linter pass locally with my changes
• I have added tests that prove my fix is effective or that my feature works
• I have added necessary documentation (if appropriate)

[codecov]

Codecov Report

Merging #4835 into development will decrease coverage by 0.05%.
The diff coverage is n/a.

@@               Coverage Diff               @@
##           development    #4835      +/-   ##
===============================================
- Coverage        23.53%   23.48%   -0.06%     
===============================================
  Files              481      481              
  Lines             5085     5085              
  Branches            16       16              
===============================================
- Hits              1197     1194       -3     
- Misses            3884     3887       +3     
  Partials             4        4              

Impacted Files	Coverage Δ
app/routes/events/view/sessions/list.js	3.84% <ø> (ø)
app/components/tabbed-navigation.js	33.33% <0.00%> (-20.00%)	⬇️

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