Fix snow particles not pausing

[LiteralGenie]

Fixes #689

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 50.00000% with 1 line in your changes missing coverage. Please review.

Project coverage is 18.45%. Comparing base (970c7e6) to head (98c6153).

Files with missing lines	Patch %	Lines
src/panel/effects/snow.ts	50.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #690      +/-   ##
==========================================
- Coverage   18.46%   18.45%   -0.02%     
==========================================
  Files          31       31              
  Lines        1527     1528       +1     
  Branches      198      198              
==========================================
  Hits          282      282              
- Misses       1235     1240       +5     
+ Partials       10        6       -4     

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[tonybaloney]

thanks!