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

❌ Patch coverage is 0% with 19 lines in your changes missing coverage. Please review.
✅ Project coverage is 70.28%. Comparing base (798a974) to head (aeeedaf).

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

❗ There is a different number of reports uploaded between BASE (798a974) and HEAD (aeeedaf). Click for more details.

HEAD has 1 upload less than BASE

Flag	BASE (798a974)	HEAD (aeeedaf)
	8	7

Additional details and impacted files

@@             Coverage Diff             @@
##             main    #7822       +/-   ##
===========================================
- Coverage   86.09%   70.28%   -15.81%     
===========================================
  Files         349      348        -1     
  Lines       54734    54752       +18     
===========================================
- Hits        47121    38482     -8639     
- Misses       7613    16270     +8657     

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