Revert TableModel insertRows to previous version

[malik-irain]

Solves #126

[codecov]

Codecov Report

❌ Patch coverage is 0% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 64.30%. Comparing base (f6b67fb) to head (09d1f8b).
⚠️ Report is 8 commits behind head on 5.0.x_dev.

Files with missing lines	Patch %	Lines
src/pymodaq_gui/utils/widgets/table.py	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           5.0.x_dev     #128   +/-   ##
==========================================
  Coverage      64.30%   64.30%           
==========================================
  Files             73       73           
  Lines           9185     9185           
==========================================
  Hits            5906     5906           
  Misses          3279     3279           

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