Implement keywords filter for Tabulator

[philippjfr]

Fixes #2946

[codecov]

Codecov Report

Merging #3298 (7aef607) into master (070b0c4) will increase coverage by 0.02%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #3298      +/-   ##
==========================================
+ Coverage   83.41%   83.44%   +0.02%     
==========================================
  Files         195      195              
  Lines       26423    26451      +28     
==========================================
+ Hits        22041    22072      +31     
+ Misses       4382     4379       -3     

Impacted Files	Coverage Δ
panel/tests/widgets/test_tables.py	99.59% <100.00%> (+<0.01%)	⬆️
panel/widgets/tables.py	87.91% <100.00%> (+0.46%)	⬆️

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