[ENH] SelectByDataIndex: data info displayed in the status bar

[aturanjanin]

Description of changes

Input/output data info displayed in the status bar.

Includes

• Code changes
• Tests
• Documentation

[codecov]

Codecov Report

Merging #4595 into master will decrease coverage by 0.02%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #4595      +/-   ##
==========================================
- Coverage   83.61%   83.59%   -0.03%     
==========================================
  Files         281      276       -5     
  Lines       56189    55387     -802     
==========================================
- Hits        46982    46300     -682     
+ Misses       9207     9087     -120     

[VesnaT]

When creating summary text self.info.format_number() should be used to format the numbers.

[VesnaT]

The two inputs are considered equivalent, so I would omit this else and replace the upper condition self.data and self.data_subset with self.data or self.data_subset.

When only one dataset is on the input, just show 0 in the summary.
Something like:

        summary, detail, kwargs = self.info.NoInput, "", {}
        if self.data or self.data_subset:
            n_data = len(self.data) if self.data else 0
            n_data_subset = len(self.data_subset) if self.data_subset else 0
            summary = f"{self.info.format_number(n_data)}, " \
                      f"{self.info.format_number(n_data_subset)}"
            kwargs = {"format": Qt.RichText}
            detail = format_multiple_summaries([
                ("Data", self.data),
                ("Data subset", self.data_subset)
            ])
        self.info.set_input_summary(summary, detail, **kwargs)

[VesnaT]

This is not true.
matching_output evaluates to False when len(matching_output) == 0, causing summary = self.info.NoOutput, even though dataset with 0 instances was send to the output.