Remove unavailable sets from the selection

[daanboer]

This fixes the client-side exception in the reaction template picker.

Resolves #1405

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 2 lines in your changes missing coverage. Please review.

Project coverage is 80.68%. Comparing base (2dfc41c) to head (b940053).
Report is 84 commits behind head on main.

Files with missing lines	Patch %	Lines
app/src/shared/swr-reaction-picker.tsx	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1618      +/-   ##
==========================================
+ Coverage   80.48%   80.68%   +0.19%     
==========================================
  Files         222      221       -1     
  Lines        5776     5762      -14     
  Branches     1046     1032      -14     
==========================================
  Hits         4649     4649              
+ Misses       1051     1035      -16     
- Partials       76       78       +2     

Flag	Coverage Δ
app	57.52% <0.00%> (+1.22%)	⬆️
converter	64.66% <ø> (-0.66%)	⬇️
database	83.32% <ø> (ø)
schema	92.38% <ø> (ø)

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