Fix patching a table with pd.NaT values

[maximlt]

I got this error while trying to patch a table with a pd.NaT value.

        for name, patch in patches.items():
            for ind, value in patch:
                if isinstance(ind, (int, slice)):
>                   self[name][ind] = value
E                   TypeError: float() argument must be a string or a real number, not 'NaTType'

../../miniconda3/envs/panel310/lib/python3.10/site-packages/bokeh/core/property/wrappers.py:517: TypeError

[codecov]

Codecov Report

Merging #5675 (87f9e79) into main (055d680) will increase coverage by 8.60%.
Report is 2 commits behind head on main.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main    #5675      +/-   ##
==========================================
+ Coverage   73.74%   82.34%   +8.60%     
==========================================
  Files         288      288              
  Lines       41967    41980      +13     
==========================================
+ Hits        30947    34570    +3623     
+ Misses      11020     7410    -3610     

Flag	Coverage Δ
ui-tests	37.99% <23.07%> (?)
unitexamples-tests	73.74% <100.00%> (+<0.01%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files	Coverage Δ
panel/tests/widgets/test_tables.py	99.80% <100.00%> (+<0.01%)	⬆️
panel/widgets/tables.py	88.99% <100.00%> (+1.32%)	⬆️

... and 66 files with indirect coverage changes

📣 We’re building smart automated test selection to slash your CI/CD build times. Learn more

[philippjfr]

Looks good, thanks!