[FIX] OWNeighbours fix manual apply for some options

[PrimozGodec]

Issue

Manual apply didn't work for number of neighbors and Exclude rows. Those two fields were applied automatically even when Apply automatically unchecked.

Description of changes

Manual apply is enabled for number of neighbors and Exclude rows.

Includes

• Code changes
• Tests
• Documentation

[codecov]

Codecov Report

Merging #3911 into master will increase coverage by 0.4%.
The diff coverage is n/a.

@@            Coverage Diff            @@
##           master    #3911     +/-   ##
=========================================
+ Coverage   84.32%   84.73%   +0.4%     
=========================================
  Files         385      371     -14     
  Lines       72825    64928   -7897     
=========================================
- Hits        61413    55015   -6398     
+ Misses      11412     9913   -1499

[janezd]

Good catch.

I replaced commit with a lambda function.

Some widgets have commit and some have apply, which is annoying enough because you never know what to call when working on different widgets. Now after this PR we would have apply and commit, which would have the same effect, but only after gui.auto_commit is called. This is even more confusing. :)

I think it's better to have either lambda or methods like on_n_neighbours_changed (which then call commit. Or apply. Whichever :)).