[FIX] Keywords: Fix selection and use idClicked instead of buttonClicked

[PrimozGodec]

Issue

Traceback (most recent call last):
...
  File "../orange3-text/orangecontrib/text/widgets/owkeywords.py", line 270, in <lambda>
    callback=lambda: self._set_selection_method(
TypeError: OWKeywords._set_selection_method() takes 1 positional argument but 2 were given

When making a widget PyQt6 compatible in #929, I missed a callback causing the issue.

Description of changes

Also at that time, I didn't know that buttonClicked[int] was removed on behalf of idClicked. So instead of changing the callback I am reverting the _set_selection_method to the previous state and using idClicked callback instead.

Includes

• Code changes
• Tests
• Documentation

[codecov-commenter]

Codecov Report

Merging #965 (db09218) into master (9a72fc0) will increase coverage by 0.22%.
The diff coverage is 100.00%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #965      +/-   ##
==========================================
+ Coverage   77.91%   78.14%   +0.22%     
==========================================
  Files          87       87              
  Lines       12299    12299              
  Branches     1613     1613              
==========================================
+ Hits         9583     9611      +28     
+ Misses       2423     2402      -21     
+ Partials      293      286       -7