Fix function to not split time points by default

[CellKai]

Needed because the current function is ignoring the user parameter and always splits by time point.

[codecov]

Codecov Report

❌ Patch coverage is 66.66667% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 25%. Comparing base (26f64c9) to head (5a97a7b).

Files with missing lines	Patch %	Lines
src/imcflibs/imagej/bdv.py	67%	1 Missing ⚠️

Additional details and impacted files

@@          Coverage Diff          @@
##           master   #107   +/-   ##
=====================================
  Coverage      25%    25%           
=====================================
  Files          25     25           
  Lines        1688   1691    +3     
=====================================
+ Hits          421    423    +2     
- Misses       1267   1268    +1     

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