Tabulator: fix index out of bound error when updating table value with selected row and add_filter

[thuydotm]

Currently just a failing UI test to address #7525

Looks like the bug was in the event that passed into Tabulator._reset_selection() method.

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 19 lines in your changes missing coverage. Please review.

Project coverage is 71.31%. Comparing base (70551d3) to head (4ca76f6).
Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
panel/tests/ui/widgets/test_tabulator.py	0.00%	19 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #7822      +/-   ##
==========================================
- Coverage   71.34%   71.31%   -0.03%     
==========================================
  Files         345      345              
  Lines       52935    52959      +24     
==========================================
+ Hits        37766    37769       +3     
- Misses      15169    15190      +21     

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