Choose position to freeze tabulator columns.

[CTPassion]

As a solution to my issue #5901

Columns are ordered by the panel BE and afterwards given the "frozen": True attribute. Hence to freeze to the right of the table, those columns just needed to be put at the end of the ordered list.

The solution to freeze "left" or "right" only I think makes the most sense and is easy enough to implement - unless there is demand for more complicated ways to freeze columns.

The change only adds a new way to freeze columns, the old way will work identically.

example_frozen_columns.mp4

[codecov]

Codecov Report

Attention: 5 lines in your changes are missing coverage. Please review.

Comparison is base (ed34b1c) 71.66% compared to head (f96921e) 83.57%.
Report is 1 commits behind head on main.

Files	Patch %	Lines
panel/widgets/tables.py	68.75%	5 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##             main    #6309       +/-   ##
===========================================
+ Coverage   71.66%   83.57%   +11.90%     
===========================================
  Files         305      305               
  Lines       45440    45463       +23     
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+ Hits        32565    37996     +5431     
+ Misses      12875     7467     -5408     

Flag	Coverage Δ
ui-tests	40.26% <70.58%> (?)
unitexamples-tests	71.64% <32.35%> (-0.03%)	⬇️

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[philippjfr]

Thanks so much @CTPassion, this is really great! When I first implemented this I did plan to support left and right but didn't follow through. I don't think Tabulator supports frozen columns that are not right or left aligned anyway and the syntax makes sense to me.

[CTPassion]

Thanks so much @CTPassion, this is really great! When I first implemented this I did plan to support left and right but didn't follow through. I don't think Tabulator supports frozen columns that are not right or left aligned anyway and the syntax makes sense to me.

No problem :) Next up would be to freeze groups left or right - but as this wasn't a requirement for me I left it for now.